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Thread: heads on 340 -66

  1. #1
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    heads on 340 -66

    Hi, i have rebuilt a Buick 340 Engine and i have some problems. To high comp. My head left, is marked B 1376330 J
    How do i know if it is for a 300 Engine or a 340 Engine?

  2. #2
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    That is a head casting number common to both the 300 and 340. The difference in compression in these engines was in the CC of the piston crown and depth down the hole.
    Steve B.



    67 GS 525 Buick Stage IV
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