[crewguy]

I had a 1965 9' camper on my 65 3/4 ton for years. Brakes were fine, just give yourself a bit more room. I later installed a factory brake booster and the power brakes were great. I would advise if you get a used booster, have it rebuilt. I've used Booster Dewey, at Power Brake Booster Exchange in Oregon several times.