396/427 Engine block identification - NCRS Discussion Boards

396/427 Engine block identification

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  • Gerald C.
    Extremely Frequent Poster
    • June 30, 1987
    • 1273

    396/427 Engine block identification

    I have this block that carries a casting #3856961 on one flange and PASS on the other. I looked this up in my books and couldn't find any responding number of identification. On the front of the motor is does say Hi-Perf 4 X

    Any help out there?

    Thanks,

    Jerry
  • Keith B.
    Extremely Frequent Poster
    • September 15, 2014
    • 1575

    #2
    Re: 396/427 Engine block identification

    It's a 65-66 396 block used in full size Chevys, and Chevelle. Does it have anything stamped on the front pad? What's the casting date? To be really sure you can measure the bore

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