yeah a 2" or even the 2.5" leveling kit will allow you to run 35's with minimal to no rubbing in most situations, however this depends on the tires you get.

Leveling the truck with 285s or 305s would be a much better option. A body lift for the newer F150 is expensive, time consuming and looks like crap in my opinion.

Like a level spacer? I've got a 2.5" already on mine, it claims you can fit 35's, but i didn't really believe it at first ha. But i'll probably just end up stickin with my level kit and throwing on 35's. At least til i get a raise at work so i can get a suspesion lift.

I ran a 325/60/18 and I really liked that tire. I am pretty sure that was the size with my leveling kit. I do agree though 35s seem a bit too large with just a leveling kit. Brian and Trents truck looks good but they have BFGs which I think run a bit small?

yeah the BFGs are 34.6 i do believe ar rounds about that

The BFGs do run on the smaller side, width and sidewall lugs too. I know I've mentioned before, but I had Toyo M/Ts on order until I found out that the wider sidewall lugs wouldn't clear the upper control arm. With the BFGs I can barely still my finger between the sidewall and the upper control arm. There is also very little clearance between the fender and the tire when turning (1/2"?), so it only works with stock wheels.

Most 285s and 305s, hell even 325s in a shorter 33" height will work on 9" wide wheels with 4.5" backspacing. So I guess it depends on what you're going for.

Yeah that's what i've heard. Do the BFG A/t's run a little smaller too?

I don't have a clue. I haven't bought an all terrain tire in 7 years or something so I don't pay attention.
You could check the bfg website and compare tread width and section width. There isn't much on the sidewalls, but the tread seems more square/flat to me than the km2s.

yeah the tread pattern on the ATs is more squared off and flat on the top then the KM2s. I have never actually measured them but the ATs have always looked big to me, I dont know why

Nothing against with rough country, but I find Skyjacker and rancho lift kit way better and more affordable.