About all that can be done is to talk to the shop that did this. They may have you switch to a different dampener and see if the vibration is eliminated. Watch the belts to see if they whip at different RPMs. If they whip much your issue is probably up front at the dampener. If the belts do not whip across the full engines operation range the issue is probably on the back of the engine. Then the fun begins, you”ll end up systematically pulling the tranny off the back of the bell housing and starting it to eliminate the vibration coming from the tranny. Then removing the clutch to see if the vibration changes. Beyond that your switching flywheels, then if it isn’t found the engines ends up getting rebalanced. It is obvious then that the shop missed the target weights on the crank.
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