Brian, buddy, great combo!! why dont you work with this combo a little while before getting to drastic and $$$$$ . Ive heard enough about pro-systems carbs that Im having 1 done for the vette! what ever you do talk to carb guys and get a consenses on what they think !!! magority rules!!! Also keep practicing with your setup, you know it takes time. dont jump around. your very smart at this ,I know it'll go into the 5's. David.