Came up with this new carb combo on my 427W Mustang... Replaced the rear 650 Vac. Secondary carb with a much modified Holley 4224 660 carb. Now I can have great cruising on the front 650 and once past 40% throttle the Holley 660 center squirt kicks in along with the front carb Vac. Secondary.
From a 2nd gear roll the power hits RIGHT NOW!
