If you're running a loaded 2 ton without a Hydrovac booster, you're a hazard to yourself, and everyone who shares the road with you. In order to convert to a dual chamber master cylinder and do it properly, I'd suggest looking into a system that Winnebago used on some of its motorhomes, which incorporated a dual chamber MC and two remote vacuum boosters, one for each axle. Swapping to the entire dual brake setup, including the twin boosters, from a retired motorhome would allow you to take advantage of pre-existing engineering, and make the installation as safe as possible. The only advantage of a dual chamber MC over the single unit your truck was engineered for is the redundancy of having half a brake system if a line or a wheel cylinder fails on one axle. Use ALL the associated components of a dual system, such as proportioning valves, lines, booster(s), etc. not just the master cylinder. The system needs to be able to isolate a failed part in case of a problem, and still retain partial braking.
Jerry
I think if I lose the front or rear with only one booster, I still have boost to the good half right? And I still have the gears to slow me. I dont really have time right now to go to firewall boosters but if you have pictures of it I'd be interested in learning more. CPP cant ship until they do inventory Jan. 6 so have time to cancel the order