If you are looking for a better body than your 50 truck for racing, Rick Haines had some 37 Chevy coupe and 34 Ford coupe fiberglass bodys he was selling or giving away to salt flat racers. $2,500 for street rod and hotrod bodys,but if you turn it into a racer, he refunds your cash. I'm not sure if hes still doing it that way, but I was at his shop back in july and he still had 2 bodys behind the shop. his shop is north of St Louis, where are you at.
Good luck with your project and post a diary, ERVIN