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Another critical measurement is the deck height spec. The zero deck height of the 542 engine, when combined with the 40cc reverse dome piston, CNC-ported 78cc chamber, and .042-inch thick gasket calculated to a compression ratio of 9.5:1. In stock displacements (383/400/426/440), this could be as low as a 6:1 ratio, but keep in mind that this 542 has an additional 100 cubic inches. View Related Article
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