IMHO bigger valves are a waste of money, springs is what will get you the most power with heads. Port work never hurts, mine i mainly had done and matched the intake to them, then i had problems, so ive been running heads that dont match my intake all year, didnt seem to hurt me to much.:rofl: Cams dont seem to be a huge need when drag racing, pulling where you need power at certain rpms, they are a must imo.