Unacceptable: tubular upper control arms with no bump stop pads.

mopowers said
Glad you guys got it figured out. Sounds like the right arm just has something wrong with it. I'd be surprised if PST didn't want it back to see what's going on.

Is anything apparent when you lay the two on top of each other?

The only thing visible to the naked eye is that the barrels seem to not line up. This isn't as big of a problem with a stock arm because the rubber bushings can deform a little if needed. The bushings in the PST arms are some type of plastic or Delrin. I hoped to see something obvious, a smoking gun of sorts that would make it immediately clear. It may be a case of the "A" shape being uneven, almost like this:

340sFastback said
Sounds like Rich has to call PST? Ask for a return authorization?

That is being taken under advisement and an answer is forthcoming.