Hobartian, I recently was given a 12 ft boat, approx. 3 1/2 ft. at the beam skin on frame boat. It has been sitting in an old warehouse for about 60 years. The boat originally had a steering wheel and cable steering system with a small outboard. By looking at the boat, I would say that it probably could not have handled any thing over a 3hp motor. The transom is constructed of 3/4" marine ply. The stringers are made of approx. 5/8 by 5/8" redwood. The chines and gunwales are approx. 1 1/2"x 5/8" redwood. The frames are constructed of aluminum. The canvas is almost totally deteriorated. I would love to know who manufactured the original boat or kit. I have decided to totally restore the boat. It will be a head turner just because I've never seen anything like it around the midwest where I live. But at least you know someone has constructed something similar to what you are looking for.