If I remember right (it was like 8 years ago...) I dropped mine down and back like 1.5" and put a longer track on it. On the front I used a rivet hole on the existing bracket, just drilled it out for the bolts. On the rear I had to use new brackets and just made sure it was the same down n back measurement that the front hole was....
I LOVED the change. The sled popped up on the snow better, assuming because of the lower angle of attack. It rode smoother on the trails. And handled better off trail.
I only went from a 136x2" to a 141x2" so I don't think the handling changed any with the track change. It was all in the skid change.