The Uni of New Idea (don't think Minnie Moline had the option in their day?) of a factory snow blower on their mule.
However it didnt work well the Mule was very heavy on the left side and very light with only a blower on it on the right side, so you were basically stuck all the time. Folks would bolt 1000lbs of wheel weights on the one side to make it work....
On a more modern combine, the cold winters we have, I wouldn't want that. Getting the hydraulics and vee belts to work in minus 10 F temps would not be fun.