Hy ratamugrosa, I installed a dual master cylinder/close coupled vacuum booster kit in a 1952 one ton a few years ago, the kit came with a mounting bracket (which I had to modify to make it fit correctly) it was a close fit to the parking brake on the transmission, but it did clear. I would use the largest bore master cylinder available with the kits just to make sure you have enough capacity. If the master cylinder was originally intended for a disc/disc setup, then you must install resisdual pressure valves in each system (10p.s.i.). If you wanted to you could install just a non boosted master cylinder and use the Hydravac to boost your brake pressure, unfortunately you would have to add another Hydravac to boost the second system, hope that helps.
