Its a pretty common conversion, I’ve done it to friends SCs. You need to use the booster from a base model 89-92 Tbird and there are a few options for the master cylinder - the best one IMO is a 4 port without proportioning valves for a 92 tbird, you can just rebend the existing lines in place and the fittings thread right in, just block off the fourth port with a bleeder.