That was the damper that failed.
We took the engine from the stand and opened it up. Flywheel shook loose too. Bearings all look great but the crank snout is destroyed.
Had 2 spare cranks. Measured them both up, picked the better one, balanced it, polished it, cleaned it and put it in. The engine is now back on the dyno with locktighted flywheel bolts and a GM HP 8" balancer. It balely cleared the Clifford 2 peice cover. Had to remove 2 bolts from cover for it to clear. Ready to start on Mon. Tom
