I would stay with the 23pitch for now and keep working on your setup as far as weight distribution. As you break in the motor, you can have brief periods of WOT and can find the sweet spot.
Others may be able to recommend a good starting point for engine height.
make sure you have a long stretch of water as speed takes time to develop. Trim up just enough to get the hull to lift.
I believe, on this site, there is a good write up on driving a basscat hull……check that out as well.
good luck