Im looking at buying a set of 33x10.5 bf goodrich allterain tires but I dont no if theyll fit with out a lift on my truck.

 

is your rig 4wd? and if so you should at least change the shocks to a little stiffer shocks that should give you just slightly more height then they should work. they will probably rub when you turn and have some extra pressure on each side, but I know that you can shove up to 35's on a 4X4 dodge 1500 without lift, those rub a lot though. It should be fine though since they are only 10.5 wide

 

I agree, you'll probably be ok, as long as you are using stock wheels, Personally for like 100 bucks I would buy a 2 inch spacer, but thats just because I like that level look.