Hey Gene,
A good tool to use is [link=http://drivecalc.de/]DriveCalc[/link]. It's free and is constantly updated with motor info. You can put in the motor, the type of battery and then select a prop and see what kind of thrust and speed it will deliver. I use it will all of my Brushless conversions. Do you know what size battery you want to use? Number of cells? How heavy do you estimate the plane to be?
Curtis