[willy]

That kicker motor is what I did for my V when I had it. It actually puched that hull at just over 10mph.
In regards to extending the V20 hull I think it would be a great exercise in design, I would love to see it done just as I would love to watch Salma Hayek in the shower.
But the reality is this in my mind, it is always fun to play and who knows it might turn out to be something great. But would it be a dramatic improvement? I doubt it would. Again I think it would be a cool thing to see but I do not believe you would improve much in the performance or design.
I tell you what would be pretty cool. Build the new transom full across the back with either a glass Euro design or V21 design transom and add a contemporary Live well built in, which is the one thing I felt the V's lacked and really needed. Built into the transom like they do now. Build in good fishing rod holders in that transom along with some tackle storage. Make sure the transom blocks the majority of the sound of the motor, which was one of the major improvements in my mind from Old Schools full transom and bracket combo. You could sit there in the cockpit underway and have a normal conversation with someone. I liked that a lot.
Whatever you do to it make sure you plan for balance in the hull. It should sit level at rest with the scuppers a couple of inches above the waterline.
The Marine Surveyors sites have listed that as the number one problem with many boat/engine combos where they were doing surveys of boats with problems or which were insurance losses.
JMHO