Bought a Mach 1 for my Dad and it came with a 2004 IRS, putting the car back to stock and have no need for the IRS now. It has 4.10 gears, an IRS brace (unsure of brand), Maximum Motorsport bushings, and 3" studs. I'm including everything that would be needed for a solid to IRS swap; Rear Brakes, E-brake cables, stock Bilstein shocks, springs (H&R race springs with ISO's, have front springs as well) exhaust hangers, stock driveshaft, all hardware, etc.. The only thing that would be needed is a catback. I'd also like to mention that the diff cover does leak, but since the IRS is already dropped, now is the perfect time to reseal it! Price is $1000 picked up, I really do not want to mess with shipping this thing.