Isn't there a guy by the name of Larry Peto or something like that out by Havasu? I've seen his name a few times in some of the boating magazines. Plus, I think it was a few years ago that I saw a write-up/story with pictures about him and his shop in HOT BOAT Magazine. I can't remember the name of his shop/business, but it looked as if he can build just about anything from mild to wild with marine engines. I don't really know what kind of reputation he has, but he seemed to be knowledgable. You might ask around for his shop name and number. Perhaps someone will see this and chime in here. Hope that helps a bit.