needforspeed302

I have an 88 mustang lx 5.0... are the rear axle stabilizers(as autozone calls them), or shock that mounts horizont from the axle to the frame important? I think it is rubbing i have 245's in the rear and when hanging a hard left rear pass side makes an awful noise, sounds like tire rubbing, fender looked ok, replaced with stock shocks truts all the way around(!!mistake!!) same prob only on the rear pass though not on right?? any answers?