There is a good tech tip on this site for fabricating bedsides, http://www.stovebolt.com/techtips/bed/bedsides/index.html I did this for my 1 ton that originally had a flatbed on it, look at the pic's in my photo ablum, it is complete except for paint. Worked out very well for me. Start with a plywood mock-up, much cheaper than buying more steel.