Thanks, Stick Welding.
Still no replies on the help identify. Looks like I have something rare here. The frame doesn't look home built. There is no plate or name anywhere but it has been repainted with the tractor. The left end in the picture mounts to the same bracket as the Mott mower and used the same belt drive to the jack shaft, then another belt to the blower shaft and a chain drive to the auger on the left side. The H shaped frame has two turnbuckle style links to the tool lift bar (seen hanging down at the sides). It also has two small pulleys and a tube on the frame that looks like it once had some kind of crank and cables to turn the chute. I've only tried it a couple of times. It's a bit much for the G and the inertia from the auger keeps pushing the tractor after declutching. I do use the mower a lot, though.
I guess I'll keep looking and asking.