I am running a kit from Master Power Brakes ( bought in 2000 ). It has been working good since installed. I installed an aftermarket brake pedal so I have nothing to add for stock pedal installs. I am also running a Ford master cylinder without a vacuum booster. It all works for me, but the pedal effort is a little high for those used to modern super easy brakes. Rear brakes are stock '79 Firebird drum brakes. Both have 5 on 3/4" bolt patterns. I would ask about the master cylinder so it matches the rest of the system. Those small 8 or 9" vacuum booster don't do much, they have very little vacuum reserve so after a couple quick stops and you are out of vacuum. I test drove a '65 GTO with the small booster, might as well not had it on!
All the parts of my brake system can be bought at most any parts store, the only custom made pieces are the caliper brackets and the inner bearing adaptor. The calipers and rotors I believe are '70-'79 GM Camaro/Firebird, bearings are GM outer and Ford inner. I looked up the numbers once, and both were easy to get. I do have 15" Ralley type wheels made for disk brakes.
