You didn't say what year your bird is, any 8.5 from 70 up will require a shortened driveshaft by 1", don't be fooled by it fitting, your current shaft will go in but as the car goes up and down on bumps it will bottom out and bend something or somethings. Easiest way to do it is to line up your mounts on the new rear and then cut them off and weld them on in the proper location, or as suggested by a Currie etc all set up but $$$$$$$$$$$$$$$