Cool project! As to the engine discussion, I run a Johnson 2-stroke 115hp and with a 3 blade aluminum prop (not exactly the most high-performance!) I get planing at around 14-15 knots, and cruise at 22-25 knots. Top speed is around 34-35 knots. Plenty fast for me in this hull. Dogbomb on this site has a Suzuki 140hp, and he loves that motor - you might look at those in your quest to power this boat. Most folks with this hull consider 150hp the most anyone really needs, and there are some guys with 90hp's that love them.
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