409 Chevy Engine - 481-Inch 409 Stroker
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Besides normal precision balancing, the only other crankshaft machine work involves turning the 454 crank snout down to 1.250 inches so an externally balanced small-block Chevy 400 damper can be used. Remember, later '91-up 454 cranks are no-go due to their one-piece rear main seal and its noncompatibility with the 409 block. View Related Article
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