Register now to get rid of these ads!

SBC block 3970010 I.D help

Discussion in 'The Hokey Ass Message Board' started by YoungGun, Oct 6, 2010.

  1. YoungGun
    Joined: Jan 30, 2006
    Posts: 289

    YoungGun
    Member

    i have a chance to buy a motor from a friend its a 3970010 block with pop ups,461 heads,and a big cam

    well its been decked down,so no pass side ID pad so i cant be sure its a 350//327//302

    are there any other ways to ID the motor i can probably take the pan off im guessing the crank will tell me?? i know if its a 4 bolt its a 350 but if its not i want to make sure i dont pass on a 302

    Thanks to all
    CB
     
  2. DD COOPMAN
    Joined: Jul 25, 2009
    Posts: 1,121

    DD COOPMAN
    Member

    Your basic 350. DD
     
  3. patman
    Joined: Apr 30, 2007
    Posts: 541

    patman
    Member

    Without knowing the application code that was stamped on the deck...there's no way to tell without opening it up and measuring the bore and stroke (or getting a part number off of a piston)

    With an 0010 block...it could be a few different things, but odds are it's a 350.

    Besides, if it has been decked, the original rotating assembly is probably long gone, so it wouldn't matter if you could read the stamp.
     
  4. ChevyRat
    Joined: Oct 12, 2007
    Posts: 575

    ChevyRat
    Member

    It's a late 70's (I believe 1977) 350 4 bolt truck block. I have had a couple of them.
     
    Ryan72 likes this.
    Register now to get rid of these ads!

  5. Beebeebobby
    Joined: Sep 5, 2010
    Posts: 224

    Beebeebobby
    Member
    from Webb City

    69-79 350 2/4 Car, Truck or Vette.:)
     
  6. goodgarb
    Joined: May 29, 2007
    Posts: 113

    goodgarb
    Member
    from TACOMA,WA

    Send me a picture of the flywheel end of the crankshaft and i can tell you what crankshaft is in.
     
  7. YoungGun
    Joined: Jan 30, 2006
    Posts: 289

    YoungGun
    Member

    thanks for all the help

    but if i ID the crank wont that tell me what it is if its a 350/327/302

    ive bought several cars with decked motors they all had original rotating assemblies..have a 355 deck with one so chances are 50/50,

    whats the flywheel end going to show as far as to ID

    thanks cb
     
  8. goodgarb
    Joined: May 29, 2007
    Posts: 113

    goodgarb
    Member
    from TACOMA,WA

    All 010 blocks are 4" bore unless it has been bored out?, crankshaft ID will tell you at least that it is a 350 crankshaft and not something else, like say a small journal 327 pull in it with spacer bearings, or a large journal 327 crank in a 350 block? lots a things can be done? and have been done , so at least you would know what crank is in it.
    Mark
     
  9. squirrel
    Joined: Sep 23, 2004
    Posts: 44,020

    squirrel
    Member

    probably at least 99% of the 010 blocks made were 350 engines, I'd be really surprised if it's something else...but a look at the crank flange should tell you.
     
  10. YoungGun
    Joined: Jan 30, 2006
    Posts: 289

    YoungGun
    Member

    i have good understanding of stroking and destroking,bore and all that but i just wanted to learn more to positively ID it but i doesnt look like i can since its decked
     
  11. squirrel
    Joined: Sep 23, 2004
    Posts: 44,020

    squirrel
    Member

    Actually you can pretty easily tell if it was originally a 350 or something else...what's the last digit of the date code? if it's not a 9 then it's a 350....and if it is a 9, it's still most likely a 350
     
  12. Fast55097
    Joined: Oct 16, 2007
    Posts: 114

    Fast55097
    Member
    from S.A. TX

    We got a 302 out of a 1959 Apache my brother bought. the seller said it was a 350. We pulled it out to inspect it. All those Z28 parts, intake, heads, pan, crank flange, and DZ code on the pad made us suspicious the seller was not correct...
     
  13. squirrel
    Joined: Sep 23, 2004
    Posts: 44,020

    squirrel
    Member

    I hope you got a refund! :)
     
  14. dave lewis
    Joined: Dec 12, 2006
    Posts: 1,346

    dave lewis
    Member

    The flanges all look different....302 is round, 327 is slightly oblong, and 350 is almost square on one end..
    Thats what the flywheel end will show
    Dave
     
  15. Fast55097
    Joined: Oct 16, 2007
    Posts: 114

    Fast55097
    Member
    from S.A. TX

    dad is stashing it for his '30 A 5 window.
     
  16. Bib Overalls
    Joined: Aug 3, 2001
    Posts: 4,064

    Bib Overalls
    ALLIANCE MEMBER

    Some of the 010 blocks are two bolt mains. Like the one in my roadster. I have been told the 010 blocks are cast from a good iron alloy.
     
  17. YoungGun
    Joined: Jan 30, 2006
    Posts: 289

    YoungGun
    Member

  18. Weasel
    Joined: Dec 30, 2007
    Posts: 6,708

    Weasel
    Member

    My 3970010 block is a DZ302 - I was just mocking up the induction on it this evening....
     
  19. Jmountainjr
    Joined: Dec 29, 2006
    Posts: 883

    Jmountainjr
    ALLIANCE MEMBER

    The block number - in this case 3970010 - is not the same as the block alloy casting codes (010, 020) that show alloy content and are cast inside the timing cover area on the front of the block.
     
  20. squirrel
    Joined: Sep 23, 2004
    Posts: 44,020

    squirrel
    Member

    actually the "alloy casting codes" don't tell you anything about the alloy of the block, they just tell you which block casting numbers that particular end mold was used to make.

    If you don't believe it...then tell me what 509 means as an "alloy casting code"?
     
  21. 57tailgater
    Joined: Nov 22, 2008
    Posts: 653

    57tailgater
    Member
    from Georgia

    The 010 blocks are supposedly made with a higher zinc and therefore better. They came both in 2 and 4 bolt main configs. I have one in my truck that I'm trading off to my brother-in-law. I do not know if it's a 2 or 4 bolt but I do know it came out of a '74 Blazer. My pad numbers confirms it's a 350 and it came from Flint. Pad numbers don't tell you a lot at least on mine. :cool:
     
  22. lippy
    Joined: Sep 27, 2006
    Posts: 4,147

    lippy
    Member
    from Ks

  23. harrington
    Joined: Jul 22, 2009
    Posts: 421

    harrington
    Member
    from Indiana


    Man I read that and started laughin my ass of, that's funny shit right there....
     
  24. mart3406
    Joined: May 31, 2009
    Posts: 3,055

    mart3406
    Member
    from Canada

    ----------------
    The "good alloy if it's a 010 block" is an old
    wives tale. All a "010" casting number suffix
    indicates is that the block has a 4 inch diameter
    bore. *Some* 010 blocks - particularly, those
    used in medium-duty truck applications - had
    higher nickel and/or higher tin content iron - but
    most "010" suffix blocks used in passenger cars
    and light trucks didn't.

    Mart3406
    ======================
     
  25. brad chevy
    Joined: Nov 22, 2009
    Posts: 2,627

    brad chevy
    Member

    That block no. was used in 69 thru 79 cars,trucks,vettes,most of the truck engines were 4-bolt main the date code no is on the rear top of block just behind dist.got one in the shed was told it was 69 but after researching date code its a 74 truck engine, the date code is just above where the bell-housing bolts up.
     
  26. Truckedup
    Joined: Jul 25, 2006
    Posts: 3,864

    Truckedup
    Member

    That's correct,and you may need to pull the cam gear to see it.It's the nickel and tin content in the block.
     
  27. squirrel
    Joined: Sep 23, 2004
    Posts: 44,020

    squirrel
    Member

    Do you have a reference to verify that? Sounds like an old wives tale to me
     
    Baumi likes this.
  28. HEATHEN
    Joined: Nov 22, 2005
    Posts: 7,592

    HEATHEN
    Member
    from SIDNEY, NY

    I've seen 3970010 blocks with no numbers under the timing cover, with "010" under the timing cover, and with "010" and "020" under the timing cover. However, I've never been shown any definitive proof what the numbers mean.
     
  29. squirrel
    Joined: Sep 23, 2004
    Posts: 44,020

    squirrel
    Member

    I have two old 350 blocks in my shed. The 3970010 block has "010" in the timing cover area. The 3970014 block has "014" in the timing cover area.

    It's pretty obvious to me what it means, but I'm not an old wife.
     
    Baumi likes this.
  30. Jmountainjr
    Joined: Dec 29, 2006
    Posts: 883

    Jmountainjr
    ALLIANCE MEMBER

    Q: What is a Bowtie, or heavy duty (nickle) block and do I have one?

    [SIZE=+2]A:[/SIZE] Tin and nickel are two metals that are commonly alloyed with cast iron to improve durability, hardness and heat dissipation. Some production engine blocks have the numbers "010", "020" or both cast into their front face, just above the main bearing bore. (The timing cover must be removed for these numbers to be visible.) If both numbers are present, one about the other, it indicates that the block alloy contains 10% tin and 20% nickel. A single number, either a "010" or "020" represents the amount of nickel and indicates negligible amounts of tin. No numbers, other than the casting numbers that are typically found beneath the timing cover, translates to only minor amounts of tin and nickel being present in the block alloy. However, cylinder wall thickness is the overridering consideration - and a block with no tin or nickel and thick cylinder walls is generally preferable to a high nickel block with thin walls.
     

Share This Page

Register now to get rid of these ads!

Archive

Copyright © 1995-2020 The Jalopy Journal: Steal our stuff, we'll kick your teeth in. Terms of Service. Privacy Policy.

Atomic Industry
Forum software by XenForo™ ©2010-2014 XenForo Ltd.