I'm a huge fan of the LS platform as my Jeep needs one, but am unsold on marine applications, especially in a jet boat setting. I've seen a Northstar in full dress in one before and it was kind of a turd, more than a normal jet boat anyway. I like the idea of doing something different, but don't know that I've seen anything along the lines of a tunnel ram for that platform. Not to mention, you'd then end up with the tunnel ram issues with fat and lean conditions from cylinder to cylinder. If I were going to do it, I'd leave it in tact, fuel injected, and turnkey.