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View Poll Results: 1969 buick 455 pistons are interchangable with the 430 motor

Voters
10. You may not vote on this poll
  • Yes !

    1 10.00%
  • No !!!!!!!

    9 90.00%
Results 1 to 4 of 4

Thread: 1969 430 pistons interchangable for 455 pistons ?? yes/no

  1. #1
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    Question 1969 430 pistons interchangable for 455 pistons ?? yes/no

    ALMOST finished my rebuild when my son (he's 5) who was helping dropped a piston and cracked it ! huntong some on ebay (std size) but there are more 455's out there at more competative prices...

    so... the specs in the book all look like the should drop straigh in but of course they are not all the specs so can somoene tell me will a set of 455's pistons drop into my 430 ?


    TIA and happy new year everyone !

    .

  2. #2
    the specs in the book all look like the should drop straigh in


    huh?

    455 bore = 4.3125"

    430 bore = 4.1875"

    a .125" difference in bore is WAY beyond any acceptable tolerance.
    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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    doh !

  4. #4
    Bob does have engine specs on the big blocks listed here:
    http://www.teambuick.com/forums/view...5_engine_specs
    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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