A snow blade was offered for your tractor.
It is a model 302
http://www.partstree.com/parts/?lc=Cub+Cadet&mn=302
That said if you have a relatively flat drive and you go easy you could probably get away using the 2150. The AGS trans is the weak link. AGS or Auto Gear System is a 6 speed with a forward and a reverse set of wet clutch packs. People get in trouble with them by mistaking them for Hydros. The proper way to operate the AGS is to pick the speed with the gear selector and then hold the pedal all the way down in forward or reverse, do not slip it or you will burn up the disks in the clutch just like riding the clutch in a car.