[vin63]

He'll need to talk with a reputable driveshaft maker about the specifications of the truck: weight, drive train (including driveshaft angles) and driveshaft measurements. There are some critical speed factors involved that are closely tied to driveshaft length. I have run everything from carbon fiber to sold steel from Mark Williams in my race cars. I have used local builders for my street car/hot rod projects. If he has exhausted the local builders, I would talk to Mark Williams, Strange, Denny's, etc. about building a driveshaft specific for his application.