What does giving a truck a slight front end lift do?

Lifting the front would make it higher, in my opinion.

2.5 Rough Coubtry leveling kit will level your truck out
2 inch leveling kit won't level it and 3 inch leveling kit will frick up the four wheel drive

Makes it FAF.

It levels the truck giving it more curb appeal. Trucks naturally be slant down toward the front.

Auto spring 2.5" leveling kit. I've had one on on all 3 of my f150s

What's the biggest tire you can go with on a 2.5" lift and not have rubbing?

What about the biggest tire without a lift and no rubbing? Id like to fill in the well as much as possible.

If your f150 is 4x4 you can put 35" tires on with a 2.5" or 33" with no lift. My f150 had 18" wheels, my tire size was 305/65/r18 which is a 34"X11.5" tire. Personally I would stick to 33's regardless, to minimize fuel efficiency loss and save on wear & tear.

I have a 2wd and run 275/70r18. No rubbing. Comes out to about 33" X 11". Looks good too


Edit: I used to have 305/55r20 and had slight rubbing at full turn but it was nothing serious. My current set up doesn't stick out past the wheel well though so it cuts down on all the dirt getting thrown up on the sides of my truck bed.

I've always put a 2-1/2" leveling kit on mine. What does it do? Well for one it looks a heck of a lot better IMO and gives your front end a lot more clearance.

Yeah. I can in a couple minutes