All of the fast boats use GM/Chevy power now days. One of the few places where you can use whatever you want for power and go fast without getting the local uniform people anoyed.
I attached a photo of my small boat. A 21' custom out of california. Superb workmanship but best of all it is powered by a 572 C.I. chevy, forged crank, carillo rods, JE pistons, full roller cam, crane 1,7 rockers, polished and ported Dart heads, Dart intake, 850 BG carb and it runs all day on pump fuel. Clocked at 111.3 on radar.
When you cannot run it on the road put the engine in a boat!