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flat top pistons
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  1. Engine
    I recently bought a spare 400 engine for my 71 Grand Prix, an L78 with the 6X 8 heads which have large D shaped combustion chambers. It has 7.7 CR, Jimmy Carter era low compression, and I want to bump it up to the low 9's and put a medium cam in it for some perfomance. I wonder if this is a...
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