Hey Jeff,

Before you ask if it can be done….. Ask yourself if it should be done.

I’ve never sailed a Viper 640, but….. By the looks of your picture (if that’s your boat) – she looks like a beautiful machine. My point – If she were a basket case (a total shamble)… ok I could see trying something along the lines of what you are thinking. But she appears to be in great shape – why not keep her “stock” and build up (or buy) something else. I guess I’m a purest when it comes to stuff like that. If the boat were beyond any hope of becoming a “complete” boat again – I could see playing with modifications. You run the risk of taking the boat out of its class – making it un-marketable. Breaking the boat by over powering it. Or simply turning what would seem to be an inexpensive modification - in to a project that would cost more than a stock replacement.
Don’t mean to rag on you – it sounded like a cool idea! If you’re looking for more of a thrill, more power, and a quick way to impress the chicks….. Move to two hulls! Sounds like you’re a closet Cat Dude anyway!

Ballast