Truck was originally single axle 2-ton. if it was upgraded in that era,it probably would've had a Truckstell unit,(tag axle) installed. The New owner still has the Build spec's. I'm glad that whomever owned the truck,upgraded it like he did,otherwise it may have met its demise long ago. I'm Glad the New owner is planning on switching the truck back to G.M. small v-6 Diesel,and Maybe an Allison Automatic??