RE: How about Blount?
Nice Boat! Blount builds a nice nice steel boat-mostly commercial. I have a friend that had the "Walter E Phipps" built in the early 70's, and it was used as a research vsl (mostly for Raytheon as a test platform) .
It had a hyvo drive - a 6-71 with a walters V drive mounted under it and connected by a wide rubber belt. The system worked really well, the belt had to be replaced every 3000 hrs. Belts were easily obtained because they were an industrial off the shelf item ($125).
Luther Blount stayed active at the shipyard well in to his 80's, and his daughter now runs the place with several other siblings.