You Have seen a photo of it when I brought it home some time back. Photo in my Gallery.You mentioned that it looked to long for a 5100 so I looked and discovered that it had been stretched 41"That corresponds to the added drive shaft section& carrier bearing. I am just now getting to it. The cab will come off the frame and placed on a dolly for restoration. Next try to start it and see what we have. If it seems solid enough may keep the original drive line.I have to admit that I am tempted to put a 12 valve cummins in it. I don't know whether to shortened it back up and use it to pull a 5th wheel car trailer to instate shows with my 54 3100 pickup on the trailer OR leave it as is and put a ramp body on it.