Just wanted to thank everyone for their advice regarding the appropriate prop on my boat. I installed a Revolution 4 21 pitch this year, and the cavitation is almost all gone. Boat runs 65 on GPS at 5,000 RPMs.
Now my only problem is the tabs. Eddie Marine will only sell a complete system with the pumps and switch. I am going to try and cut them and maybe replace the rams with something else to avoid spending $2,500. I would not buy their product knowing that you can't buy a spare part if you damage something. This summer I just took them off.
.... and I may have to do something about that dry exhaust. My cousin clearly hear the boat on the golf course a mile from the water. May be a bit much.
Thank you again for all the good advice.
Don