I will have to concur with DJ on this one... With a little twist to what he said about the minimum lift and the large tire size.
I have an '01.5 Ram 2500 with the H.O. 24 valve Cummins, and the factory rear Dana 70 with Disc brakes. I only have 2" leveling springs on the front, and nothing else. But, with only a minor trim of the fender to clear my 37" Goodyear MT/R Hummer tires, on the 12 bolt re-centered H-1s with 3.5"BS. I mainly use the truck as my daily driver, but also do some wheeling in it. Easier trails like Fins & Things, Poison Spider Mesa, Kane Creek, Moab Rim, and more of the like.
Here are a couple pictures for your viewing pleasure. The first one was taken the day I installed the new 12 bolts that were wearing 36" Bias-ply Hummer surplus rubber. (if you look close, or zoom in, you will see that the tires are rubbing on the back of the fenders)
Now, the next two are pictures taken after I trimmed approximately 2" of body out of the fenders. I tapered the cut to take the most metal on the bottom and less as the cut moved upward. This way, I did not cut into the interior of the cab and risk leaks, and such.
I know the picture quality is pretty $hitty... Also I know that this is with the 36s. I have been running the 37s for a good while now and this fall I will be switching over to a set of 36" TSL SXs that Hundy (100dollarman) is selling.
Even with the 37s on there, I have not rubbed the body, frame, control arms, nothing. Hope this helps you out.