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Small block Chev Stamp Pad Question

Discussion in 'The Hokey Ass Message Board' started by superbell, Mar 16, 2011.

  1. superbell
    Joined: Mar 3, 2001
    Posts: 349

    superbell
    Member

    I am putting a 30 Ford coupe together on a deuce frame for a new track soon to be built here in Shelton WA. Yeah pretty cool for us here in the North West but I have bought a so called "IMSA" small block 355 from a fellow that had it built for a failed project of his. cast number on the block is 3970010 and I get that it says 350 4 bolt mains or maybe even 2 bolt. Heads have a cast number of 3973487 and they are 202's I have that too, but where I am getting lost is the stamp pad. It has 2 lines of numbers on the pad with the top line starting with K1107T4W and the bottom line having C91124540 , the only thing I can get is the K in the top line is meaning the engine is from Canada? What does the rest of everthing mean? Thanks a heap, Rick
     
  2. It was probably originally put in a car as a dealer replacement motor.
     
  3. superbell
    Joined: Mar 3, 2001
    Posts: 349

    superbell
    Member

    I had a thought of it being a replacement but I have never seen one quite like this, I have seen some replacements that had a blank pad and the dealer restamps but I am sure to get "schooled" by an expert here...
     
  4. 53sled
    Joined: Jul 5, 2005
    Posts: 5,818

    53sled
    Member
    from KCMO

    I saved the mortec pages, just in case. sorry for the length.
    That's what she said.

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    <META NAME="Keywords" CONTENT="casting number, assembly date code, engine assembly date code, suffix code, engine suffix code, block codes, head codes, Chevy big block casting numbers, chevy small block casting numbers, casting number locations, mortec, mortec inc., find casting numbers, casting numbers, block casting date, chevy interchanges, engine interchanges, chevrolet interchange, chevy casting number, chevy casting numbers, chevrolet casting numbers, head casting numbers, casting numbers, big block casting numbers, small block casting numbers, block casting numbers, head casting numbers, cylinder head casting numbers, chevy castings, big block, V-8 casting numbers, chevy V-8 casting numbers, chevy big block, small block, chevy small block, smallblock, big block, engine building">
    <TITLE>Chevy V-8 Engine Block and Head Casting Number Locations</TITLE>
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    <H1><CENTER><B><FONT SIZE=+3>CHEVY V-8 CASTING NUMBER LOCATIONS</FONT></B></CENTER></H1>
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    <br></td>
    <td valign="top"><B>We get a number of inquiries regarding casting numbers, engine build
    dates and engine assembly/suffix codes. Many folks want to know where to
    look for these Chevy engine casting numbers and codes on blocks and cylinder
    heads so we decided to put these
    pages with photos together to help you find them. Most are easy to find once you know
    where to look. There may be a great deal of grease and crud covering them
    that will have to be cleaned before you can read them. Also trying to read
    them while the motor is in a vehicle can also be harder, especially the
    block casting numbers and casting dates at the rear of the block. Hang
    in there, if you try, you can use a mirror and a little patience for the
    hard to see and reach areas. Some folks also use a piece of aluminum foil to make a rubbing of the numbers and dates on the rear ledge of the block. Others have used children's Playdoh to make an impression of the numbers.</B>
    <P><B>Keep in mind that some of the numbers or letters can be difficult
    to read. A &quot;6&quot; can look like an "8" or an "8" can look like a "3". A upper
    case letter "I" can look like the numeral "1" and visa versa. Some times
    part of the number may be missing. A "T" can have the top horizontal part
    of the letter missing making it look like the upper case letter "I" or
    a lower case letter "l".</B>

    <P><B>Remember that you have to look at ALL of the numbers, features and
    parts characteristics to figure out what it is you are looking at. A number
    of the casting dates refer only to the year of the decade so you will have
    to see which other features the part has to determine which decade it was
    made in. Some casting dates do have the year and the decade indicated,
    making it easier.</B>

    <P><B>We are always looking for new Chevy engine castings numbers. If you
    have some information you want to share with us and our visitors, send
    us an email with the data. Right now we are limiting our listings to Chevy
    V-8 blocks, cranks and heads. As new castings are released on late models keep
    your eyes open for the new numbers. Thanks!</B>

    <P>

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    <CENTER><IMG SRC="rule03.gif"></CENTER>

    <P>
    <CENTER><IMG SRC="diagram1.gif" ALT="Casting number and casting date locations" HEIGHT=200 WIDTH=200></CENTER>

    <P><B>The diagram above shows where each of the casting identifiers is located on the engine.
    (1) shows the location of the HEAD CASTING NUMBERS and the HEAD CASTING DATE located under the
    valve covers, in the rocker arm valley. (2) shows the position of the BLOCK CASTING DATE
    on the rear ledge of the block near the bell housing mounting surface. If you have an early
    big block or a late model smallblock, the BLOCK CASTING DATE may be on the passenger side of the engine block, (see 2A), instead of the rear ledge of the block. Some smallblock blocks may also have the BLOCK CASTING DATE on the driver's side of the block. (3) indicates the position of the BLOCK CASTING NUMBER. Later blocks may also have the size of the engine displacement in liters listed at (3). (4) indicates the position of the ENGINE ASSEMBLY DATE/SUFFIX CODE and partial VIN code information on the front of the block. (5) on the rear flange of the block, on the drivers side near the oil filter pad, is an alternate block location for some VIN codes. (6) indicates the sides of the block where some blocks may have the size of the motor indicated in cubic inches or in liters. The last three numbers of the block casting number may also be repeated in this location.</B>

    <P>

    <CENTER><IMG SRC="rule03.gif"></CENTER>


    <H2><CENTER><B><FONT SIZE=+3>CHEVY V-8 BLOCK CASTING NUMBER LOCATIONS</FONT></B></CENTER></H2>

    <CENTER><IMG SRC="rule03.gif"></CENTER>


    <P><B>There are three block casting number types to look for: the block
    CASTING NUMBER, the block CASTING DATE and the ENGINE ASSEMBLY DATE/SUFFIX
    CODE.</B>
    <P>
    <DL><B>BLOCK CASTING NUMBER</B></DL>
    <P>
    <B>The block casting number on smallblock and big block Chevy V-8 motors
    is located on a ledge found at the rear of the block, most often on the
    driver's side. This ledge is below the deck of the block and the ledge
    forms the mating surface between the block and the transmission bellhousing.
    Some of the later model blocks have the casting number on the passenger
    side of this ledge. The number itself can have 6, 7 or 8 numeral digits.
    They might look like this "361959" or "3970010" or "14015445". The block
    casting numbers do not have any letters in them. There are sometimes individual
    letters found on blocks like "GM" or "CFD" for the Central Foundry Division,
    but they are not part of the block casting number. Also some of the later blocks
    have the size of the motor shown in liters. You may see a "5.0" (305) or "5.7"
    (350) cast on the rear ledge of a smallblock or a "7.4" on the side of a big block 454.
    On the side of some later blocks the last three digits of the block casting
    number are cast into the block, but these are difficult to see when the engine
    is in a vehicle.</B>
    <P>
    <CENTER><IMG SRC="cast2.gif" ALT="Block casting number" HEIGHT=218 WIDTH=294>
    <IMG SRC="cast13.gif" ALT="Block casting number" HEIGHT=218 WIDTH=294></CENTER>
    <P>
    <CENTER><IMG SRC="cast17.gif" ALT="Block casting number & casting date" HEIGHT=218 WIDTH=294>
    <IMG SRC="cast14.gif" ALT="Block size in liters" HEIGHT=218 WIDTH=294></CENTER>
    <DL><B>BLOCK CASTING DATE</B></DL>

    <P><B>The block casting date indicates when the block itself was cast in the
    foundry. This date does not indicate when the motor was assembled and then
    later placed into the vehicle at the factory. The block casting date is
    usually found on the rear ledge of the block on the passenger side, but
    some later model blocks have the casting date on the driver's side of the
    rear ledge. Some of the early big blocks made in the Sixties have the block
    casting date located on the passenger side of the block near the freeze
    plug holes. On these, if the early big block is in the car you will have
    to get under the motor to see the casting date. Do it while the car is
    on a lift. The casting dates look something like this "E 12 7". The "E"
    stands for the month of the year with "A" being the month of January, "B"
    being the month of February and so on thru the letters to December. In
    this case the "E" stands for the month of May, the fifth month of the year
    and the fifth letter of the alphabet. The "12" stands for the 12th day
    of the month. The "7" is the year of the decade. Now unfortunately this
    could be '57, '67, '77, '87 or '97 depending on which part you are looking
    at. Some casting dates have both the year of the decade and the decade
    itself. They look like this "E 12 77", meaning May 12, 1977. The fun starts
    when you have a casting date from the first nine days of the month that
    look like this "D 2 6". Does that stand for April 2,1966 or does it stand
    for April 26th and the year is missing or hard to see? You have to look
    closely and carefully to be sure.</B>
    <P>
    <CENTER><IMG SRC="cast3.gif" ALT="Block Casting Date" HEIGHT=249 WIDTH=259>
    <IMG SRC="cast7.gif" ALT="Block Casting Date" HEIGHT=249 WIDTH=259></CENTER>
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    <B>CHEVY V-8 CASTING NUMBERS</B><br><br>
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  5. 53sled
    Joined: Jul 5, 2005
    Posts: 5,818

    53sled
    Member
    from KCMO

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    <META NAME="Keywords" CONTENT="casting number, bowtie, Chevrolet, heads, mortec, blocks, camel hump, angle plug, gen.I, gen.II, gen.III, vortec, mortec inc, chevy casting number, head casting numbers, casting numbers, small block casting numbers, block casting numbers, head casting numbers, chevy castings, chevy V-8 casting numbers, mouse motor, chevy casting numbers, small block, chevy small block, smallblock, bigblock, chevy casting numbers, sbc, bbc, goodwrench, 18 degree, sb2 2, symmetrical port, lt1, lt4, lt5, ls1, pontiac, buick, zr1, sb2, 262, 265, 267, 305, 307, 302, 327, 350, 400, 383, 377, 283">
    <TITLE>MorTec, Inc. Chevy Smallblock V-8 Casting Numbers List</TITLE>
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    <tr><td><CENTER>
    <B>GO TO BIG BLOCK V-8 CASTING NUMBERS </B>&nbsp;&nbsp;&nbsp;
    <B>GO TO CHEVY 348-409 V-8 CASTING NUMBERS</B>
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    <BR>












    <CENTER><B><FONT SIZE=+4>CHEVY V-8 CASTING NUMBERS</FONT></B></CENTER>




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    <B><FONT SIZE=+2>SMALL BLOCK CHEVY V8 CASTING NUMBERS</FONT></B>
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    <BR><br>
    <B><FONT SIZE=+2>SBC BLOCKS</FONT></B>
    <BR>
    <PRE>
    <B>CASTING#.....SIZE...YEAR...MAIN CAP BOLTS....NOTES</B>
    <BR>
    <B>140029.....350...80-84...2
    330817.....400...72-80...2
    355909.....262.....75....2
    355909.....305...76-79...2
    360851.....262...75-76...2...Monza V-8
    361979.....305...77-79...2 or 4, some Canadian assembled heavy duty blocks have 4-bolt main caps
    366245.....350...78-79...4...Bowtie
    366286...................4...Bowtie, siamesed,
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; straight nodular iron main&nbsp;
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; caps, 2-piece seal, 4.00-4.150"
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; bores, 2.45" main journals
    366298...................4...Bowtie, Aluminum, billet main caps, 3.398" bore with sleeves, two piece rear main seal.
    366299...................4...Bowtie, Aluminum, nodular
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; iron splayed caps, wet sump,
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 4.00" bore
    389257.....302.....67....2
    393288.....283...65-67...2
    460703.....350.....78....4
    460776.....305...78-79...2
    460777.....305...78-79...2
    460778.....305...78-79...2 or 4, some Canadian assembled heavy duty truck blocks have 4-bolt main caps
    471511.....267...79-82...2
    3556519....283...58-61...2
    3703524....265.....55....2...No oil filter
    3720991....265...56-57...2
    3731548....265...57......2...No side motor mounts
    3731548....283...57......2...No side motor mounts
    3737739....283...58-64...2
    3756519....283...58-62...2
    3782870....327...62-67...2
    3789817....283...62-64...2
    3789817....327...62-67...2
    3789935....283...61-64...2
    3790721....283...62-64...2...Chevy II recessed oil filter boss
    3790721....327...65-66...2...Chevy II recessed oil filter boss
    3791362....327...62-67...2...Chevy II recessed oil filter boss
    3792563....327.....65....2
    3792582....283...64-65...2
    3794226....283...58-63...2
    3794460....327...62-64...2
    3830944....327.....63....2
    3834810....283...64-66...2
    3834812....283...62-63...2
    3837739....283...58-62...2
    3849852....283...57-66...2
    3849935....283...65-67...2
    3858174....327...64-67...2
    3858180....327...64-67...2
    3858618....350...68-76...2
    3862194....283...65-67...2...Chevy II recessed oil filter boss
    3862812....283...62-64...2
    3892657....302.....67....2...Z-28 Camaro
    3892657....327.....67....2
    3892657....350.....67....2...Camaro
    3896944....283...66-67...2
    3896948....283...66-67...2
    3903352....327.....67....2
    3914636....307.....68....2
    3914638....307.....68....2
    3914653....307...68-73...2
    3914660....327.....68....2
    3914678....302.....68....2...Z-28 Camaro
    3914678....327.....68....2
    3914678....350.....68....2
    3931174....307.....68....2...Truck
    3932371....307...69-73...2
    3932373....307...68-73...2
    3932386....302.....69....4...Z-28 Camaro
    3932386....327.....69....2
    3932386....350.....69....2 or 4
    3932388....327.....69....2
    3932388....350.....69....2 or 4
    3933180....327...68-69...2
    3951509....400...70-71...4
    3951509....400...74-80...2
    3951511....400...70-73...4...Some replacement blocks had 2-bolt main caps
    3956618....302.....69....4...Z-28 Camaro
    3956618....327...68-69...2
    3956618....350.....69....2 or 4
    3956632....307.....69....2
    3959512....327...62-67...2...Was also used for some "CE" replacement blocks
    3959532....283...64......2...Used for some "CE" replacement blocks
    3959538....327...........2...Chevy II recessed oil filter boss, Used for some Chevy II "CE" replacement blocks
    3970010....302.....69....4...Z-28 Camaro
    3970010....327.....69....2...Trucks and industrial
    3970010....350...69-80...2 or 4
    3970014....350...70-76...2 or 4
    3970020....307...69-73...2
    3970024....307...69-73...2
    4715111....305.....80....2
    6259425....350...69-76...2
    10036033...350...........4...Goodwrench crate motor, 2-piece rear
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; seal, "Hecho en Mexico"
    10046164...305.....86....2
    10049804.................4...Aluminum, Pontiac Super Duty version of Gen.I SBC, 4.00" bore, <br> 350 mains, 2-piece rear seal, splayed caps, GTP race block
    10051182.................2 or 4...Bowtie, 3.75"-4.30" bores, 1 or 2-piece rear seal
    10051184.................4...Bowtie, 4.00"-4.155" bores, 1 or 2-piece rear seal
    10054727...350...86-up...2 or 4...one piece rear seal, some "Made in Canada"
    10066036...350...........2 or 4...Target Master/Goodwrench crate motor, 2-piece rear
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; seal, "Hecho en Mexico"
    10066038...350.....92....4...Goodwrench crate motor, 2-piece rear
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; seal, "Hecho en Mexico"
    10090511...350.....90....2...LT-5, ZR1 Vette, 375hp
    10125327...350...92-up...2 or 4...Gen.II LT-1, reverse flow cooling
    10125327...350...96-up...2 or 4...Gen.II LT-4, reverse flow cooling
    10134398.................4...Bowtie, Aluminum, 4.125" bore, 2.65" main journals
    10134996.................4...Bowtie, Aluminum, 4.125" bore
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2.65" main journals
    10153558...350...91-92...4...LT-5, ZR1 Vette, 375hp
    10168588...265...94-96...2...L99, Gen.II, 4.3 Liter V-8, Caprice, reverse flow cooling
    10199001...350...93-95...4...LT-5, ZR1 Vette, 405hp
    10243878...305...96-98...2...Vortec truck, roller cam, one-piece rear seal
    10243880...350...95-00...2 or 4...Vortec truck, Gen.I crate motors and "ZZ4", roller cam, one piece rear seal
    12550592...350...97-up...crossbolted block, Gen.III, "LS1", aluminum
    12551358.........99-up...Gen.III, 4.8L or 5.3L, cast iron, truck
    12551364...364...98-04...crossbolted cast iron Gen. III, 6.0L, truck
    12559378...350...99-up...crossbolted block, Gen.III, "LS1", aluminum
    12559846...350...98-up...crossbolted block, Gen.III, "LS1", aluminum
    12560621...350...98-up...crossbolted block, Gen.III, "LS1", aluminum
    12560626...350...99-up...crossbolted block, Gen.III, "LS1", aluminum
    12560629...350...99......crossbolted block, Gen.III, "LS1", aluminum
    12561168...350...01-up...crossbolted block, Gen.III, "LS1", aluminum
    12562174...350...98-up...crossbolted block, Gen.III, "LS1", aluminum
    12568952...364...05-up...crossbolted block, Gen.III, 6.0L, aluminum, LS2
    12566910...325...04-up...crossbolted block, Gen.III, 5.3L, aluminum, SSR truck
    12571048...325...04-up...crossbolted block, Gen.III, 5.3L
    12573581...364...98-04...crossbolted cast iron, Gen.III, 6.0L, truck
    12577184...364...98-04...crossbolted cast iron, Gen.III, 6.0L, truck
    12577396.........02-up...Gen.III, 4.8L or 5.3L, cast iron, truck
    14010201...305...80-85...2
    14010202...305...80-85...2
    14010203...305...80-85...2
    14010207...350...80-85...2 or 4
    14010209...350...80-85...2 or 4
    14010280...267...79-82...2
    14011064...350...83......4
    14011148...350...87-89.......Roller cam, one-piece rear seal
    14016376...267...79-82...2
    14016379...350...77-79...2 or 4
    14016381...305...80-84...2
    14016382...305...79-84...2
    14016383...305...80-85...2...Truck
    14079287...350...86-90.......Truck
    14088526...350...87-89.......Roller cam, one-piece rear seal
    14088548...350...86-88...2 or 4
    14088551...305...86-87...2...one-piece rear main seal
    14093627...305...87-94...2...Roller or flat tappet cam, one-piece rear seal
    14093638...350...87-95...2 or 4...Roller or flat tappet cam, one-piece rear seal
    14094766...305...86-up...2...One-piece rear seal
    14101147...305...85-up...2
    14101148...350...86-90...4...One-piece rear seal
    14102058...305...87-91...2...Roller cam, one-piece rear seal
    22551656.................4...Chevy/Olds Rocket block, 4.00"-4.190" bores, 2.45" main <lb>
    journal sizes, splayed caps, dry sump, <lb>
    2-piece rear seal, 9.025" deck
    22551660.................4...Chevy/Olds Rocket block, 4.00"-4.190" bores, 400 mains <lb>
    journal sizes, splayed steel caps, wet sump, raised cam <lb>
    2-piece rear seal, 9.300" deck
    </B></PRE>

    <BR>

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    <BR>
    <B><FONT SIZE=+2>SBC HEADS</FONT></B>


    <BR><BR><B>If you don't know where to look on your engine for all of the casting numbers, casting dates and suffix codes, see our pages at www.mortec.com/location.htm and www.mortec.com/locatpg2.htm.</B>
    <BR>
    <BR>
    <PRE>
    <B>330545.....73......350..........76cc chamber, 2.02/1.60
    333881.....74-75...350..........76cc chamber, 2.02/1.60
    333882.....74-80...350/400......76cc chambers
    340292.....70's.......Over the counter, angle plug, 64cc chamber
    354434.....75-79...262/267/305...60cc chambers
    358741.....76-79...305
    376445.....77-85...350..........76cc chamber, small valves
    376450.....75-81...262/267/305..6 or 7 exhaust bolt holes, 60cc chamber
    462614.....77-79...305..........60cc chamber
    462624.....75-86...350/400......76cc chamber, 1.72/1.5, 1.94/1.5 or 2.02/1.6 valves
    458642.....75-84...350..........350
    468642.....76-up...350/400
    471513.....79......267/350
    517513.....79......267/350
    1816887....63......283..........Made in "Canada", GMC HD truck
    3636839....55......265
    3703523....55......265
    3713358....55-56...265
    3713569....55-56...265
    3725306....56......265
    3731539....57......283..........283 HP FI
    3731544....57-61...283
    3731554....57-62...283
    3731556....57......283..........Truck, Made in Canada
    3731762....56......265..........Vette, 2x4 carbs
    3737775....62-67...283/327
    3740997....57......283..........1x4, 2x4 & FI (exc.-283hp)
    3743056....58......283
    3743096....62-67...327..........GMC Truck
    3747363....57-61...283
    3747460....59-67...283/327......70cc chambers
    3748770....58......283
    3748772....58-61...283
    3755537....57-62...283
    3755539....58-62...283
    3755549....57-62...283
    3755550....59......283
    3755585....62-67...327..........GMC Truck
    3767460....59-60...283
    3767462....62-67...327
    3767465....59-61...283
    3767754....59-61...283..........60cc chambers
    3767792....60-64...283
    3774682....60-64...283/327......70cc chambers
    3774684....62-64...327..........75cc chambers
    3774692....58-64...283..........60cc chambers
    3782461....64-66...327......Camel hump,no accessory holes,160/62cc port volumes,62cc chamber
    3782461X...60-63...283/327..Camel hump,no accessory holes,larger 172/64cc port volumes, 62cc chamber
    3795896....63-65...283......60cc chamber
    3795896....62-64...327......60cc chamber
    3798996....63-67...327
    3814480....60-67...283/327..70cc chambers, 1.72/1.5 valves
    3814482....62-67...283/327/350..75cc chambers
    3817680....63-67...283/327
    3817681....62-67...327
    3817682....61-62...283
    3836839....55......265
    3836842....57-67...283/327
    3837064....56-62...265/283
    3837065....55-56...265..........Truck
    3848720....57-58...283
    3876775....60-67...283/327......75cc chamber
    3884520....60-67...283..........Some marked "Made in Canada", 60cc chamber, also used by Studebaker
    3884520....62-67...327..........Some marked "Made in Canada", 60cc chamber, also used by Studebaker
    3890462....66-67...302/327/350..Camel hump,no accessory holes,64cc chamber
    3901068....87-up...350..........Crate motor, 285hp, 64cc chamber
    3911032....68......307/327......70cc chamber
    3912264....58-62...283
    3912265....63-64...283
    3912311....65-67...327
    3912313....65-67...327
    3917290....67-68...307/327
    3917291....67-68...302/327/350..Camel hump,no accessory holes,64cc chamber
    3917292....68......327/350......Camel hump,64cc chamber
    3917293....67-68...307/327......75cc chambers
    3927185....69-76...307/327/350..70cc chambers
    3927186....69-70...302/350......Camel hump,64cc chambers,accessory holes
    3927187....69-70...350..........Camel hump,64cc chambers,accessory holes
    3927188....69......327..........74cc chambers
    3927188....70......307..........74cc chambers
    3931633....68-73...307
    3931635....68-76...350
    3931638....68......327..........Truck
    3932441....69-70...350..........76cc chambers
    3932441X...69-70...350/400......80cc chambers
    3932454....69-73...307
    3932454....69-79...350..........Truck
    3946812....69......350
    3946813....69-79...350..........Truck
    3947040....68......327.........."Right angle" casting identifier, 64cc chambers, good HP head,
    used in trucks, no accessory holes
    3947041....69-70...302/350......"Right angle" casting identifier, 64cc chamber, accessory holes, good HP head
    3947041X...69-70...302/350......"Right angle" casting identifier, 64cc chamber, 165cc intake port, accessory holes, good HP head
    3951598....70......400..........76cc chambers
    3964286............350
    3965742....70......350..........over the counter, angle plug
    3970126....67-71...327/350
    3973370....69-70...350..........over the counter in US, Canadian 350/300hp production use in Pontiac, 64cc, straight or angle plug
    3973414....70......350..........LT1-350/370hp, Camel hump, 64cc chamber
    3973487....71-72...350..........1.94/1.5 or 2.02/1.6 valves, was also used on '71 350/330hp LT1, 75cc chamber
    3973487X...71-72...350..........1.94/1.5 or 2.02/1.6 valves, 75cc chamber
    3973493....71-72...400..........76cc chamber
    3986316....71......350..........76cc chamber
    3986336....71......350..........76cc chamber
    3986336X...71......350..........76cc chamber
    3986339....71......307/350......74cc chamber
    3986339X...71......307/350......74cc chamber
    3986388....68-76...307/350
    3991492....70......350..........LT1,Camel hump,accessory holes,64cc, straight plug
    3991492....70-up................over the counter,Camel hump,64cc, straight or angle plug
    3998916....72......350..........also used w/'72 350 LT1, big valves, screw in studs, 76cc chambers
    3998920....72-73...350
    3998991....72-73...307/350......75cc chambers
    3998993....72-73...307/350......75cc chambers
    3998993....current..350.........Goodwrench crate motors,"Hecho en Mexico", 75cc chambers
    3998997....72-73...350/400......76cc chambers
    3998997....78-84...305/350......76cc chambers
    4079261....75......350
    10033867........................Aluminum,over the counter Pontiac 23' head,62cc,angle plug, 196cc intake port
    10045434........................Over the counter Pontiac 15' head
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 55cc, angle plug, raised runner
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; aluminum, "roll over" head
    10051101........................Bowtie, aluminum, 55cc, angle plug
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; raised runner, 196cc intake port
    10065202...87-95...350..........Truck
    10065203...87-95...350..........Truck
    10065204...87-95...350
    10065205...87-95...305
    10065206...87-95...350
    10065207...87-95...305
    10088113...88-up...350..........Aluminum, 58cc, angle plug, raised
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; "D" port exhaust, 1.94"/1.5" valves
    10093328........................Over the counter, Pontiac 15' head
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; aluminum,224cc ports, 61cc chambers,
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; "roll over" head
    10106178...90......350..........LT5, ZR1, DOHC, 32-valve,&nbsp;
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pass. side, aluminum
    10106179...90......350..........LT5, ZR1, DOHC, 32-valve,
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; drvs. side, aluminum
    10110810...91-up...350..........Gen. 1, 65cc chambers
    10120928...87-95...350
    10125320...94-96...350..........Gen.II LT1, cast iron version, used
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; on "9C1" Police package, Impala SS,
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Cadillac Fleetwood, Buick Roadmaster
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; reverse flow cooling&nbsp;
    10128374...92-up...350..........Gen.II LT1, 53cc, angle plug,
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; aluminum, reverse flow cooling,
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 175/68cc ports
    10134352........................Bowtie, 45cc, angle plug, "low"
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; port, 223cc intake port, aluminum,
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 18' race head
    10134363........................NOTE:&nbsp; This casting # has been used
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; in many different versions of this
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; aluminum 18' and 15' Bowtie race head.
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Different chamber volumes, port
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; volumes, port locations, valve sizes,
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; etc. were used.&nbsp; Check this casting
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; carefully to determine which features
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; it may have.&nbsp; There are at least 6
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; different versions as of 11/99.
    10147898...95-98...350..........Gen.I crate motor
    10159550...87-95...350
    10159551...87-95...305
    10159552...87-95...350
    10159553...87-95...305
    10174389...91-94...350..........LT5, ZR1, DOHC, 32-valve,
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; drvs. side, aluminum
    10174390...91-95...350..........LT5, ZR1, DOHC, 32-valve,
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pass. side, aluminum
    10185040........................Bowtie, aluminum, 45cc chambers,
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1st version, symmetrical ports,
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 263cc intake ports, splayed valves
    10185040........................Bowtie, aluminum, 45cc chambers,
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2nd version, symmetrical ports,
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 240cc intake ports, splayed valves
    10205245...93......350..........Gen.II LT1, aluminum, reverse
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; flow cooling, 175/68cc port volumes
    10207643...94-96...350..........Gen.II LT1, aluminum, reverse
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; flow cooling, 175/68cc port volumes
    10208890...94-96...265..........Gen.II, L99, 4.3 Liter V-8, cast iron, reverse flow
    10215339...97......350..........Gen.III, LS1, aluminum, 68cc
    10225121...94-95...350..........LT5, ZR1, DOHC, 32-valve,
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; drvs. side, aluminum
    10225122...95......350..........LT5, ZR1, DOHC, 32-valve,
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pass. side, aluminum
    10239902...96-up...350..........Gen.II LT4, aluminum, reverse
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; flow cooling, 195cc port, 54.4cc chamber, angle plug
    10239906...96-up...350.........."Vortec 5700", "L31", 64cc chamber,
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 170cc intake port, 1.94"/1.5" valves
    12367712...99-up................"Fast Burn", aluminum, 210cc intake,
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; port, 2.00/1.55 valves, 62cc chamber
    12367713...99-up................"Fast Burn" used on ZZ430 crate motor, aluminum, 210cc intake
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; port, 2.00/1.55 valves, 62cc chamber
    12480005...2000.................LS1 "GTZ", aluminum, 38cc, 2.125"/1.625" valves, angle plug
    12480011...97-up................Bowtie "SB2.2", aluminum, 2nd
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; version of "SB2", 48cc chambers,
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; "mirror ports", revised valve
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; angles &amp; plug location
    12506450...87-95...350
    12509859...87-94...305
    12516852...87-95...350
    12529742...95-96...265..........Gen.II, "L99", cast iron
    12551561...96......350..........Gen.II, "LT1", aluminum
    12552520...97-up...305..........Vortec, truck
    12554290...94-96...350..........Gen.II, "LT1", cast iron version, used
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; on "9C1" Police package, Impala SS,
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Cadillac Fleetwood, Buick Roadmaster
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; reverse flow cooling
    12554291...95-96...265..........Gen.II, "L99", cast iron
    12555690...96......350..........Gen.II, "LT4", aluminum
    12556743...99......325..........Gen.III, 5.3L, aluminum, truck, van
    12558059...97......305..........Vortec, truck, 1.84"/1.5" valves
    12558062...98......350..........L31 Vortec, truck, 64cc chambers, 1.94/1.5, 170cc intake port
    12558806...97-98...350..........Gen.III, "LS1", aluminum, 68cc
    12559853...99-up...350..........Gen.III, "LS1", aluminum, 68cc
    12559862...99-00................Gen.III, aluminum 4.8/5.3L
    12559895...00-up...325..........Gen.III, aluminum, Vortec 5.3L
    12561706...01-04................Gen.III, 5.3L, aluminum
    12561873...99-01...364..........Gen.III, 71cc, iron
    12562317...01-04...364..........Gen.III, 71cc, aluminum
    12564241...00-up...350..........Gen.III, "LS1", aluminum, 68cc
    12564243...01-up...350/364......Gen.III, "LS6", "LS2", aluminum
    12572035...01-04...364..........Gen.III, 6.0L, aluminum, 71cc
    14008856...79-81...267
    14010201...82-85...305
    14011034........................Bowtie, cast iron, 64cc chambers,
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 184cc port volume, angle plug,
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; "Phase II" head
    14011049........................Bowtie, aluminum, 55cc chambers,
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; angle plug, 180cc ports, "Phase 6"
    14011083...55-86...350..........Crate motor for years indicated.
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 285/300hp, 64cc chambers, 1.94"/1.5" valves
    14014415...80-85...267/305
    14014416...80-86...305..........1.84"/1.5" valves, 58cc chambers
    14014440...80......305..........1.84"/1.5" valves
    14019821...80-86...350
    14019924...79-81...267
    14019926...80-86...350
    14010516...80-86...350
    14020517...80......350
    14020555...81......305
    14020556...81......350
    14022056...85......350
    14022206...80......350
    14022301...80-86...305
    14022601...80-86...267/305......1.72"/1.5" or 1.84"/1.5" valves, 53cc chambers
    14022801...80-86...305
    14024816...........350..........76cc chambers, 1.94/1.5 valves, Gen.I crate motors
    14034806...78-82...267
    14034807...78-86...305
    14034808...80-86...350
    14034808...96-up...350..........76cc chambers, 1.94"/1.5" valves, Gen.I Goodwrench crate motors
    14034810...80-86...350..........Truck
    14034811...80-86...350..........Truck
    14039121...81-86...305..........Truck
    14039122...81-86...305..........Truck
    14071114...80-86...350
    14075381...80-86...350..........Truck
    14079261...86......350
    14085844...80-86...350..........Truck
    14085963...86......350
    14088526...........350..........Gen.II, LT1, aluminum
    14089119...86-88...350
    14094093...86-88...350
    14096217...55-86...350..........Crate motor, 285hp/300hp, 64cc chambers,
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;72' or 90' center intake manifold bolt angles
    14101081...87-95...305
    14101083...87-up...350..........Gen.I, also used on crate motors, 285 or 300 hp, 64cc
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; chambers, 72' center manifold bolt
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; angles
    14101128...86-87...350..........Aluminum, 58cc, angle plug
    14102187...87-91...305..........1.84"/1.5" valves
    14102191...87-up...350
    14102193...87-up...305/350......1.94"/1.5" valves
    22542525........................Dart/Olds/Chevy aluminum, 14'or 17' race head.
    24502559...96-97................Bowtie, "SB2", 1st version,
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; "mirror ports", aluminum, 196cc port, CNC version 280cc port, 38cc chamber
    25500141........................Buick/Chevy aluminum, 10' race head,
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 42cc chambers, symmetrical ports,&nbsp;
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 235cc intake port volumes,&nbsp;
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2.1"/1.625" valves
    25534351C..04-up................Gen.I Bowtie, cast iron Vortec head, 175/65cc ports, 2.00/1.55 valves, "small port head"
    25534371C..04-up................Gen.I Bowtie, cast iron Vortec head, 206/77cc ports, 2.00/1.55 valves, "large port head"
    33417369...90-up...350..........Gen.I Goodwrench crate motor,"Hecho en Mexico", 76cc</B></PRE>

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    Last edited by a moderator: Jun 1, 2014
  6. 55chevr
    Joined: Jul 12, 2008
    Posts: 956

    55chevr
    Member

    The larger type stamping should be --- K1107T4W --- this is a GM production number which can be decoded on the internet ...

    The smaller type stamping --- C91124540 ---is an abbreviated VIN# of the vehicle that the engine was originally installed in.
     
  7. 55chevr
    Joined: Jul 12, 2008
    Posts: 956

    55chevr
    Member

  8. K (St Catherines, Ont) 11 (Nov) 07 (day) T (usually came from a truck) 4 (?) W
    Are you sure the 7th digit is a (4) ???????
     

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