First off, I would go with these (these are what I have) (2 inch lift)
http://store.summitracing.com/partdetail.asp?autofilter=1&part=SJA-132X&N=700+115&autoview=sku
They will not only level your truck, but also gain you the clearance for 31s. If your springs are not sagging in the back (truck still has a good rake to it stock) then you shouldn't need to lift the back at all.
Here are some pictures I just took of my Ranger, I didn't have any with the truck sitting flat, so I went out and took some of it.
The only place mine rubbed were the plastic inner fender liners, if you look closely, you will see the old screw hole in the fender to the left, and the new one 1 inch back with the screw in it.
For the inside, next to the frame, I used a panduit strap (giant zip tie) through an existing hole in the liner, and around the body mount on the frame
The rear at ride height
The rear fully tucked
NOTE: With 3.75 backspaced rims, the rears will tuck like this one side or the other, because when articulated, the top of the tire will tuck inwards when it moves up. When hauling my quad (roughly 400 lbs), and the suspension compressed equally, the rear tires rubbed the bedsides. I solved this by cutting the outer wheelhouse, and spreading the bedsides outwards by 1.5 inches on each side, adding sheetmetal to the void and welding it up.
Hopefully this helps you out a little, I would personally steer clear of the bodylift for two reasons. 1: it will not increase your actual ground clearance one bit, and 2: you will still have a raked truck.