I ran TJD Cattrack (first generation)tracks on a modded Prairie 700...you sacrificed 50% of your top speed, but essentially doubled your pulling power due to the gear ratio. I say essentially because there was probably also about a 10% mechanical disadvantage loss.
They would climb anything your balls were big enough to try, and I mean anything. The most fun I had with them ever was driving around at night in a snowstorm , climbing the snowbanks at the big parking lots. They were awesome on the lake for towing the ice shack around too.