You brought back memories with this! I have not seen one of those boxes in a long long time!
When I was a kid, my Dad had a similar box setup on the '53 3100. He would put two sale calves in the box on the truck, then another two sale calves in a small single axle bumper hitch trailer and took them to the local livestock sale barn. When the watermelons or pumpkins were ripe, he would stack the box full and drive the 65 miles to the farmers market near downtown Houston.
