Vibration in engine- help!

Yes the to bearing gets worn and can be off center.If you were rough on the balancer you may have damaged it.If you have grease between the engine and transmission you may have a seal leaking or bad input bearing.Grease and oil is not good for a clutch or related components.Personally,I have never had a clutch in a big block mopar that lasted 3 years. Hope ya get the car fixed soon.