how bad shape is the body in? ususally, if you use a good primer and paint, you dont need to sand down to bare steel. Usually, all you have to do is using a DA (electric or air hand sander) and sand the entire body down until there arent any shiny spots left. Sandblasting usually will leave the body kinda pitted, and its not as easy to get a high quality finish, especially if you are doing it yourself.
88 chevy 1500, 3" body lift, 33's