ok so i have a 1991 f150 with a 3 inch body lift sitting on 33x12.50s. i plan on replacing the front springs with ones 2 inches longer and adding a 2 inch leaf in the back as a thanksgiving break project. my question is whats the largest tire i could fit under my truck without any rubbing? suppose i went with 4 inches of lift, then what size? anybody got an idea?