What makes you think it is the clutch assembly?  Check the alternator.
These brackets break, and cause a vibration problem.

Paul Rogers wrote:

> Is there anyway to confirm that the flywheel is seated correct? I've removed and reinstalled my clutch twice and each time there is a vibration in the drivetrain/power plant. I'm about to do it again. If it doesn't work this time there will be a plum of black smoke over the remains of my exvan.......
> any suggestions will be appreciated.
> thanx,
> paul rogers
> 85 westy