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closed chamber

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    I am planning on building my 1972 400 for my '72 Torino. I have been looking at Tim Meyer's parts. He offers a piston for stock heads that produces about 9.4:1 compression with a .030 overbore. He also offeres a piston that makes 9.43:1 with Aussie heads and a .030 overbore. Untitled...