GM NOS 3967811 7115 6223 Crankshaft Casting change

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GM NOS 3967811 7115 6223 Crankshaft Casting change

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06-16-2017, 12:58 PM

lbnaz

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I probably didn't ask the question correctly the first time. When opening three NOS cranks in the boxes all with part number 3967811. Two of them were a block casting 6223 and one was a regular marked crank 7115. All three are cross drilled and nitrated with the same paint marks. Just curious why the difference in them. Thanks, Larry

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