The drive is a whole other issue. The boat is a Chris Craft 222 Stinger with a single engine with an Alpha drive. Originally, it had a 350 Magnum. I've been told that a Bravo is a direct bolt up to replace an Alpha. I can't afford that right now, so I'm sticking with the Alpha.
Playing with cams and settings (like 1.6 rockers vice 1.5) on the computer simulation, it looks like I can expect 410 to 450hp while still having the torque down low to push the boat out of the hole. I'm running a 25 pitch Hydromotive prop with a nosecone so getting on plane with a full tank and people is a slight problem.
I'm hoping the Alpha stays together.
Boat is run 75% in fresh and 25% in salt water and is always flushed after use. I'm leaning either to the S/M or the Lightning headers.