AFCO makes a "lightweight lower A arm bushing that is Delrin, but I don't know if they have the uppers.
Lowers for chevelle, should fit Camaro:
http://www.secureperformanceorder.co...&ProductID=787
These are solid uppers that may fit:
http://www.secureperformanceorder.co...&ProductID=792
You could bush these with delrin I guess. I ran the Guldstrand solid upper bushings on my 67 and they were fine.
The AFCO "offset" arms could be used, but they require new frame mounts that have the proper hole spacing, and the mounts would have to be positioned to the rear quite a bit because their A arms are not as offset as the stock arms.
You don't need taller upper balljoints if you do the Guldstrand mod.
If you did want taller upper balljoints, Mark at SC&C has some made by Howe that are beautiful. The Truck upper balljoint I mentioned requires not only the wider bolt pattern in the A arm, but the tapered hole in your spindle needs to be reamed larger. Not a lot of fun to do in a hard spindle, and not needed with the Gmod.
David