I have discovered the one and only meaning of PITA.  Dropping the rear axle down in a Jeep Cherokee 8 times.  At least 8 times, I've really lost count.  Three times today alone.

I THINK I have the driveline angles straightened out. ( HA... I made a funny!)  As follows:

Two .075 shims between the frame, and the crossmember.  That's 2 at each bolt.  That's on top of the 1" drop crossmember.  A 2* shim under the leaf springs WITH a .075 shim.  Haven't figured out what that measures yet.  Close to 3/16" would be a good guess.  Pointing the pinion upwards.  No vib's at 30-55 mph.  Haven't had it out on the Interstate yet.  But it cured the vib's I had around 30-45 mph.

The rear u-joint is almost perfectly straight, and the front one at the TC is angled down somewhat.

While I won't complain about the amount of lift I got, 4.5", this is why I really only wanted a 3" lift.  Now I'm waiting on the 1" spacers for the front.....