Why doesn't the back end of my car sit level?
Reply #4 –
My 87 sport sits lower on the driver side rear. Like Chuck said, I think it's a fox chassis thing. Mustangs have the same issue. There was a huge thread on this over at the corral. Many pages and many theories. In a nut shell all you can do is jack around with spring heights at opposite corners (diagonally, i.e: if you lower the LR you'll raise the RF) using shims, spacers or adjustable perches (or convert to coil overs). It's not something that you can fix easily with out a lot of trial and error, read: assembly and disassembly.
Also changing ride height will affect the corner weights- but on a street car, who cares;)