Installing 97' disc brakes on the rear of an 89'??

You can' use it off the '97. The Gt has hydroboost that year.


You want the MC and booster off an 94-95 GT/V6 Mustang. You can also use the booster off a '93 Cobra if you want.

You'll also need the 3-2 port conversion kit, stock prop valve plug and an adjustable prop valve. you can't use any of the prop valve system from any 94+ Mustang.