Well, it's been a looong time since I visited this thread. I had originally stated that the strut mount fixed the pop, but after a few drives, I noticed it was still there.

I am happy to report that the pop is now completely gone. I know I've mentioned it already, but I got the rest of the GMPP parts I needed for Christmas. After installing the new parts and bushings the pop is dead. I can only assume it was either the front sway bar mounting bushings or the sway bar end links. More likely the end links in my opinion.

Anyway, just thought I would post up the final findings on this issue in case anyone else runs into it.