On a body lift it doesn't change the angle of the frame the way yours sits now. It actually lifts the body so depending on how high you go, you may see a gap between the frame and body or more of the frame. Sheet metal (or plastic nowadays) goes higher.
Like I said on my other thread, im doing a 2" leveling kit and throwing 33x12.5 tires on 20" rims on my f150.
