New Shocks?
So better shocks will help.
Centering the rear axle will reduce tire rub on the inside on the fender wells.
It is also a good idea to roll the inner fender lips. You don't need much, try bending the lips at a 45* angle from about the 10 to 2 o'clock position. It may still rub at times, but it is no big deal. Rubbing occasionally is OK, cutting into the tire is not.





