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Thread: Another 454 question

  1. #1

    Default Another 454 question

    Hi guys, my first post so go easy. I have a 454 ls6 crate engine and the only stamp mark is above water pump 1K18XAA7, it does have the 7.4,pass etc.tamps. He car is 71 chevelle originally ls5, motor swap was done in the 80'. Suppose to have closed chamber heads and 11.5 compression. Have looked for this 1k1 # with no real results
    Thanks

  2. Default

    Chevy never stamped there engines above the water pump. Could be a rebuild, and they decked it that would remove GMs #s. The # should be on the block just ahead of where the right cylinder head goes.
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