[Nor Cal driver]

tire basically anytime I am making a turn to the right - or even just slightly loading up that side - my mechanic says that a switch to a slightly larger or even much larger rear torsion bar will not solve that problem and that in order to eliminate this rubbing I may need to do much more -

My question is - what in the heck could be going on back there to allow the rub to occur.

Stock 23mm rear with a 3.0L motor - drivers side rear panel rub!!!!!