Ok I got a couple of questions. The previous owner of my car knows nothing about cars. The guy that had it before him put a built t-350 and a different rear in it. Anyway the guy I got it from has no idea about the gears in the back. And Quite frankly I don't feel like pulling the diff. cover off now. I have heard that the 4 cyl cars came with 3.73s and I am thinking this might be the rear in it. I tach about 2700 @ 60 mph. Its a turbo 350 with 255/50/15 tires on it? Any idea which rear...Also its got a bent axel from where the previous owner ran it into a ditch. I measured and its bent about 1/16 of an inch. Also the rear is starting to whine a little bit. So would I be better off replacing the whole rear...Or finding the gearset and replacing the axel? Thanks!