The six pack have ALOT of potencial on a 440 but expensive and if your building a stock 9,5 of lower compresion engine whit more or less stock cam i would surgest you stay whit a 750-800cfm 4 bbl carb on a dual plane intake to save your money but if you whant to do a street pounding engine and you have the money for the 3 nasty 2 bbl carbs and intake you will defenetly have some great moments whit them