Not Ranked
All 428's are externally balanced. I believe all 427 cranks were steel but don't know if they were forged or cast. If both were offered I don't think the minor weight and associated polar moment differences between the cast and forged versions would make much difference in overall engine inertia (nothing that could not be overcome with a flywheel change). The forged piece would have a higher yield and tensile strength and better fatigue properties but I cannot imagine breaking a cast steel crank with a street engine.
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