As far as i`ve ever heard, running BIG injectors is a laborous idea on a car if it will be a daily driver. They will "dribble", causing low speed driveability and emissions problems. I wanted to go straight to 720`s as I`m shooting for (someday) 575-600WHP but the guys at Alamo Autosports gave me the lowdown on why not to do that on a daily driver.