Yup, Yup!! It can be done. With the vertical crankshaft ( Horizontal displacement ) engine, reversing the motor won't mean a thing. It's all still going to turn in the same direction.
If you use a unit with a top loading transaxle, Then the rest is a breeze. Cut, weld, resize belts, wait for a nice day, and take pictures of the neighbors laughing.
Should be a fun project. Don't forget the chromed stacks and wheelie bars!!
R.