They are cool looking trucks!
When I was a young'en, I worked for a custom hay operation. The owner bought a locally built "hay monster", which was like a flatbed truck with a hydraulicly operated snout and conveyor chain that ran the length of the truck.
One guy drove, while one or two stacked the small rectangular bales. If we stacked in the field, on a smooth field, we could move 2,000 bales/day. And we split $.09 a bale, so with 3 guys, we'd make $60 a day, which was a LOT to a poor city boy. Never was in as good of shape before or since. Doing that day after day, and you were whipped.
ron