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Gm Flywheel

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The 300hp 350 is an externally balanced engine, requiring a GM 6 3/4-inch (PN 6272221) or 8-inch (PN 1255197) balancer as well as a counterbalanced flywheel. Stage West used a 10 1/2-inch Centerforce clutch and a 153-tooth flywheel designed for the one-piece rear-main-seal engine.