Appreciate the ideas - your both most likely correct. When I saw how much more it shook when the bearing wasn't centered I started thinking it was a real critical deal to get it exactly right. So I got a laser level and aligned the center hole of the bearing with both halfs of the drive shaft and then centered it crossways sighting on the 2 mounting bolts. It still shakes. Put it up on jack stands and started it up, can see a definate wobble in rear half of drive shaft at the CV joint. Something in it or the tube must have twisted when the u-joint cap popped of at 70MPH.

I'll take it back to the driveshaft shop and complain but I have no faith that they can fix it or they would have done it the first time. On EBAY I see there is a new rear drive shaft with CV that will be custom sized for $300 from some place in Utah. Anybody ever have to replace one?