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Mdmp 2011 07 Boss429 003 The New Boss
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2 A 10.320-inch deck height is standard on the new block and matches the production spec of the original Boss 429 engine. This engine, however, was machined for 4.375-inch bores, which are 0.015-inch larger than the original engine. This delivers a 432-cubic-inch displacement, but the block can support a displacement of up to 598 inches.
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