The crankshaft probably won't work on the snowblower....
The crankshaft on the Honda GX240 reduction-unit engine is unique to that style motor; the crank is specifically designed to drive the gear-reduction system only, and will not allow easy fitting of the pulley(s) needed to for the snow blower (I assume you are trying to fit this to a 2-stage machine, most have 2-pulleys). Of course, you could tear out the crankshaft and fit in a correct-size version, but by the time and ($$) you'll spend to do that, you'd be better of trying to find a more suitable engine that can bolt on direct.