Interesting conversion I suppose, maybe you're thinking CVZ-19, they are the outboard version of the CVZ-18 which is a sbc stern drive "convertible". Someone once did a scimitar outboard, never saw it in person, only in pictures. Now, a 300 HP outboard on a Glastron I suppose is possible, but if I going to try this, I'd be looking for a Sprint or possibly a ski machine model.