hrmm fair enuff wats the best 1st step towards na engine moding ? seems like pistons are at the lower end of the list ... Power FC ? Headers, high flow cat, exhaust, intake, etc is a good start. After that look at aftermarket ECU - PM CHA54 or SuperDave as I believe they have something in the books. IMO, for most people the extra power that will give you will be worth it. After you've done that I'd look elsewhere before considering more power - better brakes, upgraded suspension, LSD, etc.