Are you dead set on the body lift? You can easily get that much lift with some rear coil spacers and F150 torsion keys up front, for under $150 in parts if you shop around.
Here's my truck, I'm running that setup w/ 285/75 16 Nitto Terra Grapplers:
ETA: In this pic it looks like the front is higher than the back becasue of the keys - it's not. It's actually PERFECTLY level, I went to great lengths to make sure of that becase I can't stand it when the front is higher than the back, lol. It's just the angle of the camera combined with the slant of my driveway.