Ya they had several different sizes for trucks ----notice that they swing with a rack type arrangement on them. A tile guy I worked for in 1966 had one like that on a 48 chevy truck. --- only used it at the big ditch to start hole to set the big wheel ohio ditcher in to start the tile line going. Heavy made units and I never ever saw one that had welds on it -----they were monsters!
Dads was the small trailer mounted tractor pto drive model . it too was heavy made.

"A machine you build yourself is a vote for a different way of life. There are things you have to earn with your hands."