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Thread: crank stroke

  1. #1
    Senior Member RACING JUNKIE
    Join Date
    Feb 2006
    Location
    Lenoir City Tennessee
    Posts
    865

    crank stroke

    i know where a crank is that is suppose to be for a 421. how can i tell if its the right stroke? i think 3.875. its for a 400 small block chevy

  2. #2
    Senior Member RACING JUNKIE
    Join Date
    Jan 2006
    Location
    La.
    Posts
    2,890

    stroke

    Yep,
    414" with std. bore of 4.125, 421 wth .030 over =4.155 bore

    Zip.

  3. #3
    Member JUNIOR BUILDER
    Join Date
    Oct 2005
    Location
    ohio
    Posts
    94
    most aftermarket cranks are marked with stroke on front throw.


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