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Brian, you can end this right now by stating what were the heads and date codes during dis assembly, and what pistons were present at the time this engine was disassembled.
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...inquiring minds want to know....
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The Dates are not the Issue as the 074's started production....I believe in late 68 for use on 427 L-88's and ZL1's.......So...It is possible for the dates to match
Ken
