Chopper question

What is the recommended hp for the 720 and 780 choppers?

On page 5 of my official One-Eighty advertising literature book, dated 1969, I have a pic of a 780 chopper chopping hay, being pulled by a One-Eighty diesel. I think you could pull it with a WD-45, but it would be slow going and the more full you kept the chopping knives the better it would perform.

There is no way to run my 780 on such a small tractor. It has 1000 pto

Had the pleasure of running a 780 for years. I have used many choppers and believe the AC 780 was one of the easiest to pull. Its downfall was the head attachments, they only worked well in ideal conditions. I first pulled it with an AC 180, it was a good match. The available HP was about the most the chopper could use on a level run. Around here there are not many level runs! We pulled 14' boxes with third beater extensions and roofs on top, when these were getting full it was taking a lot of HP to pull all this on soft ground up hill and run the chopper also. We than upgraded to a AC 200, we soon learned this was all the power the chopper could handle, the feed rolls could not get any wider and would occasionally jam. This chopper gave us problems because it was a cut and throw instead of a cut and blow. Never had any problems with corn but alfalfa was something else. It would not throw it past the beaters on the wagon. I studied the operators manual and made the adjustments to the pan that directed the flow and could get it into the wagon a lot better. I could tell more stories about this but I will stop here. Still love AC!!!!