[Big Kev-O]

Sounds like the truck needs a lot of work. I don't think there is any point is converting it to a short bed unless you complete all the repairs. Buyers are not usually willing to spend much on a project. I would pack it all up the way it is and try and recoup what you spent. The only way to get decent money would be get it complete or at least ready for paint. You would spend a lot of time & money completing those repairs.