[Dexman1349]

Update:
Went to the shop last night to go over the work they had done and to take it out on a drive to see if they could isolate the noises a little better. First thing I noticed was that the car was A LOT more noisy. It was clunking with every little bump in the road. I made an off-hand comment about them not tightening the wheels. Tech looked at me and said, "but we didn't touch the wheels." Oh crap, I had removed them when I was working on the diff bushings and had only hand tightened them so I could get it on the tow truck. 2 minutes later with a torque wrench and back behind the wheel the car was silent. Not a sound.

Turns out it was the Spohn trailing arms. No matter what we did we couldn't keep them from moving. The part that sucks is that because I've had them for more than 30 days (close to 3 months since I bought them), I'm stuck with a really expensive set of paper weights. I may try to get the del sphere ends replaced and just sell them. Definitely not a fan of Spohn right now.


In other news
The new BMR differential bushings are nice. Between them and getting the sloppy Spohn trailing arms off, the rear end feels solid once again. I do notice a slight increase in NVH from the differential, especially at speeds over 65mph where it starts to whine just a little. I know the NVH is supposed to increase with those, so nothing unexpected.

Maureen at Rodgers Chevy got back to me and might be able to get a set of Z/28 upper control arms for me. Price seems reasonable, I'm just not sure if I'm ready to get back into the rear end again now that it's put back together and working properly again. I may save that for when I get more power and really need it.