Boy is that a loaded question!. You and I talked once and you know about where I am located. I can take you 10 miles south of me and 3-14's would be a good load for a Super 88. In fact a few used  2-16's I can take you 10 miles north of me and a Super 77 would pull 3 easy. I would say probably 40%  of the Super 77's around here pulled 3-14's. A 4340 would be a nice plow for a Super 77. If you have the slow speed rear end, it might make things a little easier too. Maybe you can find someone in your neighborhood who owned one of these at one time. or at least a compareable size tractor.  It also depends on what you are plowing, and how fast (MPH) you want to travel. Questions.