A little background - my Dad passed away a almost two years ago, which is part of the reason for the choice of boat. He raced stock outboard marathons during the 1960s, quite successfully, at that. His favorite boat was a 1959 Sid-Craft DU Hornet, 13-feet long running a 1956 Johnson 30hp, and later a Chrysler 35hp, in what was called '36-Class' (for 36-cubic inch displacement). He even set a straightaway kilo record with that rig in 1966. Fortunately, I still have access to that very boat as it is part of the collection at the Antique Boat Museum in Clayton, NY.
The model will be 1:6 scale, coming in at 26-inches in length. Power will start as an Aquacraft EP1. I may upgrade the motor to brushless if it all works well. In racing trim, Dad's boat ran about 45 mph, so something screaming fast in scale wouldn't look right. We'll see when we get there...