The possibilities for replacing your rearend are almost limitless. However, my favorite swap is a Mopar 8 3/4 rear. The key dimension is the width of the rear from the face of the drums. This is where your wheels mount and if you're running stock wheels the dimension should be the same on both rearends. Typically you can go an inch or two wider and not have any problems with clearances. I have written a lengthy article on how to make this swap. If you contact me directly via email I'll try to dig it up and forward to you. It can be done in an afternoon, isn't hard, and ends up making your car more driveable. Charlie.