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Due to the fact that the engine had been bored at least one time before it got to RaceKrafters, a custom piston measuring 4.181 inch was required to fit the 4.185-inch bore (0.035 over 455), so a forged SRP slug was made to order. Eagle's H-beam forged-steel connecting rod has a stock length of 6.625 inches but was made with a bushing in the small end to support a floating wristpin. The engine's owner chose to save the factory SD rods and run aftermarket ones instead. Piston rings are from Perfect Circle.