Which version of sixpak carbs do you have? 440, 340, OEM or new replacement vacume carbs. for which year application? Which list part # and list # are your carbs. ? It makes a difference on how to tune them Also do you know if the vacume pod springs are stock and do you know if the new cam was degreed in or not? I ran several different sixpak motors and sixpak combination in my old pump gas street car Last thing is are you running a power valve in the center carb. or not? Sixpaks(set up properly) rock