[chumbucket]

Mac, he's referring to stern vs. bow attitude. When a boat utilizes trim tabs and they are actuated in a downward motion, this downward force causes the stern of the boat to lift on either one side or the other or both depending on the operator selector switches. This will in effect make the boat level off to get on an even plane overcoming the natural tendency of the bow to lift when you trim out the motor.
Run the boat before you start worrying about the prop pitch and make sure that the top end RPM's fall within the manufacturers specification (usually somewhere between 5000-5600 RPM). If it falls below the mark, your motor is working too hard. Above the mark, not working enough and equally as bad as working too hard. Generally speaking, 1" of prop pitch equals 200-250 RPM's. That usually goes both ways whether increasing or decreasing pitch. Then you can get into diameter's which will also factor in but generally to a lesser extent.