John,
Where are you getting your RPM signal from? clamp on spark plug wire? (Inductive) signal from ECU? (analog?)
RPM polarity = 0 should be good
RPM scale = 0 should be good too since you wont be going over 10230rpm!
RPM calibration is the one you will have to play with to get the right rpm.... like picking the right number of cylinders... Just change the number until you get your true idle rpm....720ish?
Good luck!