GM NOS 3967811 7115 6223 Crankshaft Casting change

06-15-2017, 12:32 PM

L78steve

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The 7115 crank with the heavier weights are for the larger 427 pistons. All 427's should have been equipped with the 7115 from Tonawanda.
Its my understanding that the 6223 can be made to work in the 427 with weight added.

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