Those little outboards were some of my favorite boats back in the day. I've never seen one with a V6 in it so I don't know how they sit in the water and so on. I do know that with a 125-135 tower or power inline merc on the back they would run pretty good. Not like today's outboards for sure, but high 50's to low 60's. There were several builders that built similar boats, I had a Schiada for a short time back in the 80's. I always liked the Rayson's too, maybe even a little better, but never had one. The early versions had no built-in well yet, be nice to find one of those and hang a bracket on it.
Here's an old ad for ya. I think they were rated for what ever was the biggest inline merc being built at that time, 100, 125, 135 and so on.
http://img.photobucket.com/albums/v2...t/raysonad.jpg