34mm VW carb on a generac

[yamahaulerG1]

I'm trying to get my boat on the water again. I fixed the cage and replaced the motor. On this motor I am using a 34mm bocar carb which is a solex clone from a VW motor. I'm also going to run this motor without the shroud or the cooling fan I hope the prop will pull enough air past the motor to keep it cool. Has anyone else ran a v-twin without the shroud on an airboat without it overheating? We all do it with the 0-84 and it stays cool and I used to run my Honda's this way because removing the cooling fan I would gain about 100rpm. Between the carb and removing the fan I'm hoping to get some more rpms out of this motor. Later I will remove the heads from my broken motor shave and port them then swap them out.