I have an 87 ford f350 4 spd dump truck... shes been around the block a few times ! here's my problem.. The dump is pretty rotted (floor of the dump) but the sides are still good and so are the main floor supports that run under the dump floor . The truck runs pretty good but she is old. I don't wanna invest in a new dump bed for her cause she is old. Friend of mine who is a race car fabricator said to cut the old floor out and in stall a new one was gonna cost a few bucks..So here is what i was thinking. The floor of the dump just has some rotted holes in it but can still hold weight. I was going to go to home depot and buy some pressure treated plywood and use self tapping screws and attach it to the floor supports. Like i said the dump floor is still there so its not like the plywood would be supporting all the weight. what do you guys think? Sorry for the long post.