How to remove gear reduction unit on a honda gx 160

A guy near me has a new Honda gx 160, however it has the gear reduction unit on it. My question is, Is it possible to remove it? I know I would have to get a different crankshaft case, but is there any more to it? Hes only asking $150 for the engine and its brand new, so I have a little room to work. Thanks
More info. It is a 2 1 reduction unit, with no clutch. Wondering if anyone has done this or if the crank length is the same or smaller.