So....my GT now has the IRS rear end and brakes from an 03 Cobra. MM bushings at the four mounting bolts. I have a set of MM control arm bushings but the guy didnt' have time to do those too, so either I will try to do them later myself if I get the nerve or just leave it like it is and maybe sell that set of bushings. It was fairly involved, the exhaust systems have to be traded, the rear ends, the pinion flange from the driveshafts have to be swapped. The springs, rear shocks, exhaust mounts, pinion snubber, all of that had to go on the Cobra for it to fit mine.