[RICK LAKE]

mickmate If the dampener is a fluid one like the ATI ones they have to warm up the fluid so the weight can move inside the housing. I get a wicked vibration in my motor warming it up. Once everything is at operating temps, mine goes away. If it's solid that's a different story.
I know you don't want to hear the next thing but, is it possible the rotating assembly is not balanced??? Crank or a rod weight is off? I know ATI provides a service to custom balance your motor to the dampener. I know the price is not cheap.
I thought you all ready replaced the clutch?? Go and get a cheap auto-zone 11" reman clutch and throw it on the car and retest. Wish you where closer. I have a new zoom Z clutch. problem is a GM bolt pattern. Re drill the flywheel to fit. Rick L.