Yes the Moog "problem solver" upper control arm bushings work.

Never heard of Ball joint problem solvers. Im sure your referring to the upper control arm bushings. The bushings have a Offset hole for the bushing bolt vs centered for a stock bushing. They work.

As far as your camber slipping back in. your adjuster bolts werent tightend enough and slipped or your shock tower is rusted and flexing in from bumps and lack of strength. Or your lower control arm bushings are shot and moving out. The Volaries had alot of extra rubber in thier Kframes