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I believe the early 1963 and 1964 292 engines had forged cranks, but if I remember correctly, they only have 6 counterweights. Crankshafts after that were cast, but they had 12 counterweights to smooth them out. You still have to be careful on how much RPM you subject either crank to, but things like zero-balancing and fluid dampers give the engine a better chance for survival over 5K RPM.

Casting number sites on the internet can give you specific number and specific years.

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12y ago

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