Offset ground crankshaft
The 3900 crankshaft is made of forged steel and has 2.25" crank pins. I had the crank offset ground to a 3.555" stroke for a rounded 4.2L
The 3900 crankshaft is made of forged steel and has 2.25" crank pins. I had the crank offset ground to a 3.555" stroke for a rounded 4.2L
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