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Hot Rods Need ideas: BBC 454

Discussion in 'The Hokey Ass Message Board' started by jackalope, Dec 29, 2016.

  1. jackalope
    Joined: Mar 11, 2011
    Posts: 687

    jackalope
    Member

    I am looking for ideas to build a tall deck 454. Got a good deal on a very low mileage tall deck block from an RV. This is likely going in my 30 coupe build. I really like the block and parts and want to make this thing have a somewhat of a vintage look despite its "new age". Any ideas for appearance in terms of intake, carbs, etc.
    I know this is new gen engine so if the thread gets roached I at least tried.
    If not, please show me some ideas.


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    Last edited: Dec 29, 2016
  2. squirrel
    Joined: Sep 23, 2004
    Posts: 50,282

    squirrel
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    tall deck 454? I've never heard of that one, but I also don't keep up with the newer engines like I probably ought to.

    there is a tall deck 427 engine used in medium duty trucks, and a low deck 454 with port EFI used on the late 90s, then a 496 (8100) engine in the 2000s.

    I wonder what it is you really have?
     
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  3. Deuced Up!
    Joined: Feb 8, 2008
    Posts: 4,098

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    I am with Jim...427 and 366 were the tall blocks....unless I missed something on the way! Which is certainly possible.
     
  4. big duece
    Joined: Jul 28, 2008
    Posts: 6,315

    big duece
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    from kansas

    A quick look at the top of the water pump mounting will tell tall deck or short. Pictured is a tall deck, a low deck has about 3/8" from the deck to the top water pump bolt. 305px-Bbc_tall_deck.jpg
    The deck(head mounting surface) is .400 taller on a tall deck. Or run some casting #'s.
     
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  5. gimpyshotrods
    Joined: May 20, 2009
    Posts: 19,181

    gimpyshotrods
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    This?
    [​IMG]
     
    Last edited: Dec 29, 2016
  6. squirrel
    Joined: Sep 23, 2004
    Posts: 50,282

    squirrel
    Member

    that is a low deck 454 HO crate motor, eh?
     
  7. jackalope
    Joined: Mar 11, 2011
    Posts: 687

    jackalope
    Member

    I will do some more verifying tomorrow but I talked with two different guys that quickly stated, "whoa, that's a tall deck" and based on that I was ASSuming they were on given the origin of the motor, etc.
    even if it's not a "tall" deck, does anyone have any "window dressing" for a 454? Intakes should be the same


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  8. squirrel
    Joined: Sep 23, 2004
    Posts: 50,282

    squirrel
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    The big blocks were introduced in the mid 60s, you can find short deck 4bbl intakes from back then, as well as different styles of valve covers. Used stuff is around....although you can also buy new MT covers, if you like spending money.

    I dig the old factory chrome valve covers that came on a lot of 396s back in the early days.
     
  9. gimpyshotrods
    Joined: May 20, 2009
    Posts: 19,181

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    Yup, as there is no tall-deck 454.
     
  10. gimpyshotrods
    Joined: May 20, 2009
    Posts: 19,181

    gimpyshotrods
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    There are some intake port variances (square/oval). You will need to match you components. There are some nice outfits that you can put on them. It all depends on what sort of look you are going for. Chrome, finned aluminum, polished finned aluminum, painted, some combo of all that, etc.
     
  11. BOBCRMAN
    Joined: Nov 10, 2005
    Posts: 846

    BOBCRMAN
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    from Holly

    Yes there are tall deck 454
    I have been building them for years. The most common are the 366-427 but there are 454 in marine and some trucks. I have three 454 tall deck 454 in the shop right now.. One is a factory re-badged unit says Toyota marine.

    You will not be happy with aftermkt bolt on parts if you want "old time looks". Most of the intakes are for race applications, unless you can find an old intake and/or use adapters... Adapters leak.. Distributor will need a slip collar, commercial body/chassis headders usually won't fit.

    Whatever engine you do have.. You will find in street use, there is "no cheap tall=decks" Most bolt on accessories from the original donor are scrapped. The heads are crap, pistons are heavy and low conpression, made for 3500 RPM max. Valve train parts are usually worn out. Cam is reverse rotation, gear drive. Tho easily changed to chain.

    But if you are building a big cube race motor. They are a bargain.
     
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  12. GMCARGUY1950
    Joined: Feb 3, 2009
    Posts: 3

    GMCARGUY1950
    Member

    Outinthegarage.com has a casting number listing. There are some 454 tall decks listed FYI.


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  13. Mr 2nd post ...
    Wtf- this is your link??? image.png
     
  14. gimpyshotrods
    Joined: May 20, 2009
    Posts: 19,181

    gimpyshotrods
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    I have overhauled about 30 454's from boats. I have never seen a tall deck. Never seen one from a truck either, and I am 35-years deep in overhauling those too.

    How about a picture or two?
     
  15. 19Eddy30
    Joined: Mar 27, 2011
    Posts: 1,359

    19Eddy30
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    from VA

    X3,never seen or Heard of 454 tall in GM production , I have seen a GM 498 tow truck motor , I believe its a tall deck , but it was 12 years ago , I have one 427 tall , Four 454 70's
    One 2000 , & a 67 427 hp vett
     
    Last edited: Dec 30, 2016
  16. chevy57dude
    Joined: Dec 10, 2007
    Posts: 6,715

    chevy57dude
    Member

    To the OP -
    Is it a complete, running engine? Intake? If you're leaving it together and painting it all one color,(chevy orange?) sounds like a plan. Double pumper, vintage VCs & white headers could look good.
    600+ ci strokers are possible but that's not what you asked about.
     
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  17. HiHelix
    Joined: Dec 20, 2015
    Posts: 381

    HiHelix
    Member

    My motor home has this same engine.
    These are plentiful in the RV and dump truck community. As far as vintage looks you will probably need to make stuff. There isn't an abundance of eye candy goodies. These are popular with large CID budget street race guys and can be built to pack quite a punch!
     
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  18. HiHelix
    Joined: Dec 20, 2015
    Posts: 381

    HiHelix
    Member

    One day these & LS engines will be accepted as traditional when all the fossils have been pillaged !
     
  19. jackalope
    Joined: Mar 11, 2011
    Posts: 687

    jackalope
    Member

    Chevy57dude,
    Thanks for the ideas as that is what I'm looking for! I will be building the headers regardless of what is available.
    I was just hoping there were intakes and maybe something else other than all the race applications I found.
    When I actually get to the point of putting an engine in this, I may talk myself out of it.
    For now, if anyone else has ideas or pics I would love to see them.
    It is a complete motor with 33k miles on it. 1973 oval port block


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  20. Phil1934
    Joined: Jun 24, 2001
    Posts: 2,717

    Phil1934
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  21. squirrel
    Joined: Sep 23, 2004
    Posts: 50,282

    squirrel
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    Those cast script valve covers are neat...I guess some folks think they look old? I don't.
     
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  22. RR
    Joined: Nov 30, 2008
    Posts: 106

    RR
    Member

    My 454 block came from an RV- it is a short deck.

    I have a tall deck BBC, but it is a 427 from a late 60's C60. Never heard of a tall deck 454.
     
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  23. Deuced Up!
    Joined: Feb 8, 2008
    Posts: 4,098

    Deuced Up!
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    Well boys I may stand corrected here but started trying to answer this 454 deck height question and actually found casting numbers for 1 GEN-IV and 2 GEN-V 454 Tall Decks...

    Block Cast #
    14044807 - 454T - four-bolt, Bow Tie, Mark IV, CNC prep, tall-deck, 4.25- or 4.495-inch bore
    24502506 - 454T - four-bolt, Bow Tie, Gen V, race prep, 10.2-inch tall-deck height
    10134366 - 454T - four-bolt, Bow Tie, Gen V, tall-deck

    http://www.hotrod.com/articles/0707phr-mark-iv-family-zl1-big-block-chevy-history/
    Scroll down to table at the end of the article. ???
     
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  24. oj
    Joined: Jul 27, 2008
    Posts: 6,281

    oj
    Member

    Maybe they used some Dart castings? there are linkages from Dart to GM. The blocks are out there, the question is whether OEM or not and whether they were 454". I recall GM provided 540's for drug interdiction boats.
     
  25. big duece
    Joined: Jul 28, 2008
    Posts: 6,315

    big duece
    Member
    from kansas

    Bow tie blocks were a performace counter part I believe, and normally would not be found in a RV motorhome. But the parts #'s don't lie. More than likley if its out of an RV is a low deck. Just check the casting #s.
     
  26. squirrel
    Joined: Sep 23, 2004
    Posts: 50,282

    squirrel
    Member

    Interesting stuff. Like I said, I don't keep up with the newer ones like I should.

    The Gen V and VI engines use a different timing cover, don't they? and a few other appearance differences. I suppose most folks won't notice.
     
  27. I have a 427T transplanted in my bus.
    I'm curious. Can you show us some pictures of your motor?
    Especially the front where the head and deck surface meet near the water pump bolts, the current intake, and maybe the crank flange and the casting # to verify if it's a tall deck. Thanks.

    IMG_5366.JPG
    IMG_5374.JPG
     
  28. jackalope
    Joined: Mar 11, 2011
    Posts: 687

    jackalope
    Member

  29. Phil1934
    Joined: Jun 24, 2001
    Posts: 2,717

    Phil1934
    Member

    The same co. offers these[​IMG]
     
  30. falcongeorge
    Joined: Aug 26, 2010
    Posts: 18,341

    falcongeorge
    Member
    from BC

    Jim, I'm with you on the chrome stockers. And they do take me back in time...
     

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