I have an 86' CJ7 w/ 39's. I recently installed Currie Axles front and rear w/ 4 Wheel Disc Brakes. I installed a 4 Wheel Disc Prop. Valve from MP Brakes. I also added a 4 Wheel Disc Master from MP Brakes. At first you had to stand on the pedal just to "kind of" get it to stop. The guy at MP brakes originally gave me a master w/ a 1.125" Bore. He swapped me out to a 1" bore. You can drive it and it does stop o.k., but it is not great. My original set up w/ Disc/Drum was much better. I thought w/ 4 wheel discs this thing would stop on a dime. I had a 74' Bronco w/ 4 wheel drums a 38's that stopped better. Has anyone converted to 4 wheel discs and know of the right master to run. I do not want power brakes, don't like em'. I don't mind spending money on my brakes, so if it is going to be a specialty company, that's o.k. But if you know of a direct bolt in replacement from another vehicle please let me know. If you know the exact donor or part number that would be a big plus. Looking for real world experience. Thanks in advance.