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Thread: bbc casting number on block, please help me

  1. #1
    Junior Member APPRENTICE
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    bbc casting number on block, please help me

    I have what i beleive is a 427 tall block with the casting number 861959, and a little ways toward the top of the block are the letters GM 10 T . Can anyone confirm this being a talldeck block...thanks alot, Rob...
    YOU GOT TO BE IN IT, TO WIN IT

  2. #2
    Senior Member RACING JUNKIE DirkaDirka's Avatar
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    Are you sure that the casting number is not 361959 instead of 861959??

    I found that the 361959 is a 454 block that was used in the 73-75 Chevelle--73-76 Passanger car I believe--and the 75-85 Truck LD.
    Its all fun and games till someone loses a nut!

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  3. #3
    Senior Member RACING JUNKIE fla1976's Avatar
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    Are you sure it isn't 361959? If it is, it is a 454 between 73-90.

    http://www.mortec.com/bbc.htm

    Beat me again Dirka!!

  4. #4
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    block casting number corrected, 361959

    The first number was a 3 instead of an 8, can you tell me if it is a tall deck? Thanks alot, Rob. Toward the center of the block is alo has GM 10 T. I need to order a distributor for it and want to make sure I get the correct length.
    YOU GOT TO BE IN IT, TO WIN IT

  5. #5
    Senior Member MASTER BUILDER
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    its a 454 from 1973-90 could be a 2-bolt or 4-bolt, all 454's are 9.8" deck height, (except bowties).

    cam6752

  6. #6
    Senior Member RACING JUNKIE
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    Buy a distributor with a slip collar and you won't have to worry about it.
    Dave
    Dave
    http://www.racingjunk.com/profile/343797
    "All that is necessary for the triump of evil is for good men to do nothing" Edmund Burke

  7. #7
    Senior Member MASTER BUILDER
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    I believe T stands for the Tonawanda assembly factory, not Truck.
    cam67152

  8. #8
    Senior Member RACING JUNKIE
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    Quick and easy check, look at the front of the block where the water pump mounts, if the top of the water pump mounting surface is within 3/16" from the deck it's a short deck 9.8. If the mounting flange is about 7/16" to the deck it's a 10.2
    No matter what the casting #'s are.

    Zip.

  9. #9
    Senior Member RACING JUNKIE
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    Quote Originally Posted by zipper06
    Quick and easy check, look at the front of the block where the water pump mounts, if the top of the water pump mounting surface is within 3/16" from the deck it's a short deck 9.8. If the mounting flange is about 7/16" to the deck it's a 10.2
    No matter what the casting #'s are.

    Zip.
    x2


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