I have a 99 Ram 1500 with a Rancho 3" lift. I also have BFG A/T 35x12.5/15 on 15x10 wheels. I get a slight amount of rubbing on the rear side of the tires when I turn all the way. As you'll find in another section of this board (under 33 vs 35's), I've taken a grinder to the seam of the body, at the back side of the front fender wells. This has cut down on the rubbing and more importantly has reduced the cuts my tires were getting. However, I would have to do some actual metal cutting to eliminate the rub. Also, if I'm ever out doing some serious 4-wheeling, I will run the risk of some serious damage to my body if I hit any deep ruts while turning.
However, when I purchased the truck, it had the same BFG 35's on a 15x8 rim and I had absolutely no rubbing - go figure!
I would recommend a 5" lift and 4.11 gears to do it right with 35's.
My moral is: I'm selling the 35's (want them?) and switching to 33's. The 35's are only two weeks old and I've even got a spare 35 to boot.
Good luck.