<font color=blue>The body. Look at the rocker panels, and more importantly the rocker boxes. These are between the rocker and the frame. If they're rotted your doors will never fit and the truck will leak like crazy. Look at the rear of the floor where the tailgate hinge bolts too, look at the floor, look at the wheeltubs and quarter panels. I'm sure theres other places to looks but these are what I can remember right now.</font color=blue>