I have a 1997 f150 4x4 and I plan to put a body lift and crank the torsion bars and maybe even a block in the rear. I'm almost certain i can tuck 35's without major rubbing. but do you think a 13.5'' wide tire would rub??

 

I'd stick with a 12.50 inch wide tire. A 35x12.50 on a 10 inch wide wheel is a ver tight fit with a body lift.

 

isn't there a site that you can punch in your truck info and it will show you what your tires would look like on it? I want to see what the biggest and widest you can fit on an 04 screw fx4 is.

 

Several tire/wheel sites have a program where you can add different wheels on trucks and look at them. I've never been impressed with any I've seen which looked like a cartoon photoshop.