Super 77 Diesel Need more POWER

I had a super 77 diesel rebuilt to 770 factory spec in 1997-98 (there was not much difference super 77 to 770 If I remember right) installed in a 770 tractor. It had no power at first. While running on a mill I played with the fuel screw untill it ran at the power my plain 77 did. Tornado came through the same day and it ended up on a generator for a while 70% to 90% veriable load but pto rpm. After that you could not stop it. It would pull my 4340 3-16" 8-10" deep clay loam soil in 4th gear high (it had a power buster) 16' feild cultivator in 4th high. I don't know how much power it had but it was alot more than rated. It pulled most loads the same as the 1650 that replaced it, that was dynoed at 70 hp. Lots of pure black smoke. At night it would have a 6" orange flame from the muffler going up hill. Shelled out 2 ring gears in 1,000 hrs. It was fun to drive but not so fun to fix. There was photos of it in action in one of the great northern oliver collectors scrap books. I think if you spend some time with it you can get more power out of it with out much cash. Good luck