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Thread: 455 identification

  1. #1

    455 identification

    Hey guys i just bought a 455 that is apart and was wondering if i can get some help identifying the parts, the #s are as follows

    Cyl head#s 1231786
    Block # 1241735 The block has oval coolant ports and two bumps between the middle cyl.
    Intake manifold #1231718
    Piston # 1231733
    crankshaft # 39736
    Just trying to identify what kid of parts i need to buy to finish putting this together, I have no valve or rockers, pushrods. what year should i be buying them for.
    Thanks for any help Phil

  2. #2
    The block has oval coolant ports and two bumps between the middle cyl.

    the block is definitely 74 or newer.
    http://www.buickperformance.com/idblock.htm


    I have no valve or rockers,

    may as well get Stage 1 valves and have the heads cut for them if the seats aren't large enough.

    http://www.buickperformance.com/455hdcompare.htm


    don't know that anybody has actually tabulated the piston casting numbers but here's an article comparing them:
    http://www.buickperformance.com/pistons.htm
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  3. #3
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    skylarkracer4v

    Hi, the heads are 1970 455 heads, but thats all I can help with, thanks,Jeff

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