Hello Spacky,
Welcome to the forum. About your snow blower, it should have an Identifaction tag riveted to the frame of the snow blower either by the gearbox or on one of the side weldments.
If its affecting the balance of the tractor making the nose light and you would not be comfortable using it you could sell it on tractorhouse.
Its best to hold on to it as all you need to do is operate it at a slower ground speed to take advantage of its cutting width where you can take a half cut and still get rid of a lot of the white crap.
You should hold on to it as it you have said it runs well. If it has a manual crank for chute rotation that would be a problem with a mule with a cab that does not have a rear window that opens.
All probably needs is changing the gearbox oil, greasing the auger bearings and the power take off universal joints and the grease fitting for the female half of the PTO shaft.
I would use it for one winter and then decide whether you want to keep it or sell it.