I spoke with my mechanic today and he was referring to the original specs from the booklet I gave him. He's said that Chris Crft 350 produces 320 hp and is supposed to run at 5700 RPM. He's said it was built or that and has a special cam etc. Interesting... I have the original 21 pitch aluminum prop and he gave me a 22 aluminum that runs great at 5700. Problem is it only goes 52 or 53 mph. I also have a brass prop but I have no idea what it is.
I am trying to get this guy to join his forum. He has all kinds of great Donzi history I am learning. Like for example, why they wanted that many RPM's for racing back in he day.