602-604

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  • crate40
    Junior Member
    • Jul 2011
    • 7

    #1

    602-604

    does anyone know if there is a difference in the 602 and the 604 engine blocks ??? Thanks
  • dynoman14
    Senior Member
    • Apr 2008
    • 1336

    #2
    602 rules allow 2 block castings and 2 head castings.

    The 880 is the common block between the 602 & 604.

    Big differences in head and intake castings so selecting out the good ones is 25+hp.
    I am also hearing there is a new lw piston and ring pack. I have not seen yet but should be getting an engine in real soon.

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