underdrive
jackwagon
Korben, yes hydroboost is the best thing to do to these trucks. Should have come factory that way. And it's the only reason I mentioned smaller tires = better braking, cause the factory booster leaves something to be desired... With a hydro larger tires are hardly an issue 
Papa, your truck doesn't scale in at over 4 tons empty tho. Difference in priorities my friend... In any case, the OP should first do the camper thing, then the spring thing, and then maybe worry about tires.
IdaSHO brings up an excellent point about the bed possibly not being quite as rigid as it may seem. Definitely worth putting that to the test.
Seabass, he has a nice flatbed, but you have a nice camper top. So there is that
Papa, your truck doesn't scale in at over 4 tons empty tho. Difference in priorities my friend... In any case, the OP should first do the camper thing, then the spring thing, and then maybe worry about tires.
IdaSHO brings up an excellent point about the bed possibly not being quite as rigid as it may seem. Definitely worth putting that to the test.
Seabass, he has a nice flatbed, but you have a nice camper top. So there is that