I have a 67 FJ-45 with a disc brake 40 front end now. I need to get a booster and master cylinder for it. What will interchange and work for me. Years, make, model, etc. I have been told that I can use a 77' ish booster from a mini p/u, but cannot use the master cylinder. I already had a booster fabbed to fit up to my pedal and a master cylinder mated up, but then found out that they are both bad! Sucks to be me. The booster leaks air out of the front and the master cylinder will not push fluid up to the front reservoir. Any ideas? Can these be rebuilt? Or back to my other idea as what will interchange and work properly for me. Thanks!!!