Re: Tires rubbing
yes you can, as long as your not jumping your truck. I have a 1" bl. on a 2.5" lift. see if you can get away with a 1" bl.
you can put a 3" bl on a 3" suspension lift if you wanted to.
I was running my friends 31x11.50 LTB's on 15x10 wheels with 3 5/8" backspacing with the current set up (3.5" lift") and I didn't rub while off roading.
Or, like Mike said, get new wheels with about 4" backspacing.