I am picking up my 2004 GMC rcswb 5.3L Sierra in about two months when I leave Okinawa Japan. I am looking to install a whipple or radix supercharger on it once the motor is somewhat broken in. I was wondering if anyone had some advice on what engine mods ie. crank, port & polish, fuel sys., gears, etc... that I should do to help the sc. I don't want my motor or drive train to wear out on me. I am looking to run 9lbs of boost and i'm trying to get somewhere around 420 rwhp. Any advice you have would be helpfull.