well, i did the exact thing. kept drum out back for now, did 02 spindles, 02 ball joints, pbr calipers. stock style fox master/booster. the car never stopped right. overly soft pedal. i bled everything right and.it stopped worse than stock fox. i bought a new master and new(reman) booster from 95. this started a domino, i ended up ditching stock valve, putting in all new lines, a ford racing prop valve, . all i have left to do is add rear disc. the car is setup for it but since it stops on a dime, it can wait