If it's a 1500 they won't work. You might....and I mean might get a 285/75 which is about a 33x11.5 tire in there properly.
There some details missing. How much lift does your kit provide? Is just a front spacer?
It'd be tight on a 2500 but has been done...just to prove a point which is stupit if the tires rub when you turn.
In perspective 5 inches of properly installed lift is right for a 4x4 with 35 inch tires, and your truck sits about 2 inches lower than a standard 4wd truck. You can get a 33 inch tire under a 4x4 without lifting it.