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Thread: bolt sizes

  1. #1
    Member CRAFTSMAN
    Join Date
    Jan 2004
    Location
    grove city,oh.
    Posts
    58

    bolt sizes

    I have en early 70s 400 sbc and I am wondering what size and thread pitch the head and crank main cap bolts are ?Thanks Tony.

  2. #2
    Senior Member RACING JUNKIE
    Join Date
    Jan 2006
    Location
    La.
    Posts
    2,890
    7/16" X14 pitch, mostly 5/8" head size, but some are 13/16 head dia.

    Zip.

  3. #3
    Member CRAFTSMAN
    Join Date
    Jan 2004
    Location
    grove city,oh.
    Posts
    58
    Thanks Zipper06,I want to freshen up the engine this winter and will need some taps and thread chasers.[/list]


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