For one, the bumper mounts to the frame, not hte body. lol.
Yeah, I think all you need to straighten it out is new bumper bracketry because well, yours is bent right now.
Remove the 4 nuts that secure the bumper to the frame horns and pull the bumper off. Replace those main bumper brackets, and youre done.
'01 XLT disguised as a '03 Fx4 Level II.