I still think it would take a ton of room that doesnt exist without MAJOR fabrication. There is a size difference but I dont think enough. I just got a used genesis and I dont think the engine was broke in correctly. I am not impressed with the power I have. Got it tuned pretty good and there is no where near "Whellie" power there. I too am very interested in engine options for the genesis. I was thinking 4 stroke but I know nothing about them to know if any puts out enough power.