Hy Gene_Spartan80, if I'm remembering my training correctly, no single shaft should exceed 72" (six feet) in length. There should be a cross member in the frame that another support bearing could be mounted to (unless the fire body installer removed it, but I doubt that). If your truck is still a factory wheelbase then there would have been a driveshaft system created for it, but I don't think your chances of finding one at a wrecking yard would be very good. You could try posting an ad in the parts wanted forum, make sure to include the year, make, and size of the truck and the driveshaft tube diameter. I think you'd be better off to have a good driveshaft shop fabricate shafts for you, hope that helps.
