I have ran 2 440s with the Edelbrock dual quad package. 2 500 cfm carbs with a 1 to 1 linkage. Great great and GREAT performance and looks! I know it not a mopar OEM offering but it is an era correct hi po set up. Its about half the price of a sixpack and easier/less expensive to tune. Id LOVE to see a shootout between the Six Pack and the Edelbrock CH28 with 2 4bbls.