They are seperate engines... It is not an issue with the crank but an issue with the harmonic... These harmonics weigh close to 75lbs and are filled with oil... The veins in the harmonic broke and all the oil moved to one side setting off a resonance frequency that the crank nor the block could withstand. After we took our spare block and did the good ol' strip n flip... we had our detroit puring once again
Tom
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