When they were made with stock springs the rear was a little lower than the front. I actually like the rear higher than stock, so to me it looks good. One way to check what springs you have is to count the the leafs on each side. You may have SS springs or the PO may have added a spring or re-arched them and added a few inches. To lower the car you can either have a leaf removed, de-arch the springs, or install a spacer.