basically, i only need enough fuel to run 17psi on stockers untill i go to big twins (2530's i think). i will be getting an s-afc shortly anyway, so can i use an adjustable fpr to crank up the fuel pressure, then use the s-afc to lean out the lowend? i'm trying not to buy 555's right now for fear i will need to replace them with 720's or 850's depending on the turbo setup i choose. -Chris