engine height

[Joker2]

I raised the engine 2 holes, took it out and it seems smoother and the wake is now clean and no spray, I heard a little loss of bite around a hard turn in the chop, but I was running it pretty hard, I think it should be fine for normal use, no issues with the temp. Now I will mess with a new prop. I maxed out @ 4500 RPM's with last years plugs and gas ( 1st trip of year ) 5 people 2 adults 3 kids and 40 gallons of gas. No GPS on boat so, no speed yet. The prop is all dinge up I filed it smooth but it's a mess 15 1/2 X 15
was reconditioned for more RPM last year. I have to start fresh. Any recomendations on prop size if I want to go to SS or stay with Alum ?