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Thread: Info Buick 455 engine block

  1. #1
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    Info Buick 455 engine block

    I Recently bought some Buick parts, one of the items was an empty 455 block SN: 1231738 which designates its a 70 -71 block. On the deck I found the prefix SF, so it might be a 70 block with 370/4600 and 510/2800. I also found another SN that I can not breakdown; 4CY136760. I am from Canada, don't know if that may be a factor. The block was machined .030 and has some surface rust. From what I understand it would now be a 462 Buick big block. Any help would be appreciated. Thank you.

  2. #2
    are you certain that the EIN doesn't start with "40" rather than "4C"?

    the EIN is just the VIN with the model / body information elided.

    4 indicates the Buick division
    'C' should be the last digit of the year of production
    Y is the plant code and should be Wilmington, Delaware.

    the rest of the EIN would match the last six digits of the VIN that the engine came from. which, since the 'SF' is the Big Body 455ci application and the six digits don't begin with a 9 ( Riv ), there's a good chance that it came out of a Le Sabre or Wildcat model.
    The way to crush the bourgeoisie is to grind them between the millstones of taxation and inflation.
    Vladimir Lenin

    Government schooling is about "the perfect organization of the hive."
    H.H. Goddard, Human Efficiency (1920)

  3. #3
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    Quote Originally Posted by bob k. mando View Post
    are you certain that the EIN doesn't start with "40" rather than "4C"?

    the EIN is just the VIN with the model / body information elided.

    4 indicates the Buick division
    'C' should be the last digit of the year of production
    Y is the plant code and should be Wilmington, Delaware.

    the rest of the EIN would match the last six digits of the VIN that the engine came from. which, since the 'SF' is the Big Body 455ci application and the six digits don't begin with a 9 ( Riv ), there's a good chance that it came out of a Le Sabre or Wildcat model.
    Thank you Bob, Looking at it again it could be a "40"

  4. #4
    oh, and you are correct. a bore of 4.3425" x 3.90" calculates to a displacement of 462.087ci
    The way to crush the bourgeoisie is to grind them between the millstones of taxation and inflation.
    Vladimir Lenin

    Government schooling is about "the perfect organization of the hive."
    H.H. Goddard, Human Efficiency (1920)

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