if you want a simple upgrade go get the small ltd wagon rear drums backing plates and the hardware it is 10 inch I think 79 pacecar was telling me this the other day. disc rear brakes are a pain in the ass and the parts are expensive. the size is usually stamped into the drum may be on other cars too, I would upgrade the fronts first. better pads braided front lines. and flush out all the nasty fluid. just something to think about.