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The 1975 Chevrolet 454 Big Block (BBC) typically came equipped with cast aluminum pistons designed for durability and performance. The standard piston size for this engine is 4.00 inches in diameter, with a compression height of around 1.88 inches. The compression ratio for the 454 in that year was generally around 8.5:1, which was designed to accommodate lower-octane fuels of the time. Depending on the specific application, aftermarket options and variations may include different piston designs for performance enhancements.

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AnswerBot

2w ago

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