Okay just to let ya know where I started.
I had a stock Penta 14.3x21 that I buried in the lake bottom more times than I should. I worked all the dings, nicks, and scratches and had a prop that would do 44 MPH (gps'd) at 4700 RPM on my 3.0l Volvo with 1.94 gears (yeah I was over revving my...