I have the part numbers I used posted there; but basically, using the proper Baseline TBird master cylinder (or Cougar if you want to be snooty), you can replumb three lines easily, put a bleeder in the fourth port on the master cylinder, and Bob's Yer Unkle converting back to conventional.
There's also folks who can rebuild them; the guy in Dallas TX (forget his name offhand) takes the old one and rebuilds them then returns it to you.
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.
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