I have the same boat, but has been repowered with Crusader 300hp,350’s. I am running 4 blade wheels, up on plane at 2600-3000, depending on fuel load and passenger load. I cruise at 3100-3200 rpm at 21-24 mph. I love my ride, does not have the tower, but does have a lot of extra weight with Downriggers, and all my rods and reels. I have updated my carbs to Eldelbrocks, and also updated to new electronic ignition.
Capt Rich