Hey Dcates,

First, you have to raise you're engine. If you're seeing that kind of water pressure at WOT, then you are way too deep. I'd think about maybe raising two holes to start, and then experiment. If you can swing it, you might want to get a manual jack plate. It will be worth it in the long run. If you don't want to go that way, you may be able to raise three holes without dropping you're water pressure below 15 psi or so.

You also have to go stainless. As far as prop selection, when you raise you're motor, any advice I give you now will be worthless. What model boat is it?

One thing to look forward to is you're going to see some huge performance increases. It will take some time and labor, but it will be worth it. Most of us like to go fast, as I do, but the side benefit is that speed is a result of efficiency. That translates into money saved on gas and oil, which can be substantial over the course of a few seasons and offset the initial investment, that is of course if you're not running WOT all the time...