Hey and welcome! If you could post some pictures that would be great. As far as parts, most are going to be fairly easy to find. Top speed with either would be from 40-50 miles per hour. Tires are going to be expensive on either model so be ready for sticker shock. Are there any numbers on the side of the hood ie, 3100, 3600, 3800 etc? Building a bed or buying a late model bed is no big deal. Look'em over and pick the one you like.
Bruce
