I have a '49 VAC that I pull a 7 1/2' finish mower to do 12 acres of grass, 2-3 times a month. It also does well with a 6' bushhog, just have to take it slow because of the non-live power p.t.o. Even with only 22 horses, it pulls downed trees around, and has been great with a rear mounted grader blade! Good Luck!
Steve