Did some crawling around in my junk pile, and found pieces of the bedsides that came with my truck. I had cut them up with the intention of scrapping them. The Long bed that came with my truck didn't have a tailgate, and it wasn't bolted down, So I have no way of knowing if it was the original 1940 longbed. It was about 48 inches wide, had 3 stake pockets, and a metal floor (GMC). The tailgate latches are still intact, but the tailgate trunions have been farm rigged. I could take pics, measurements, or even send you the partial sides.

John