Have an 1988 Ford 460, was looking to get a little more out of her without spending a fortune(almost new boat time), the stock carb is a 600 cfm vacum secondary holley, my question is would changing the carb to a 650 double pumper or a 750 vacum secondary, etc.. make a difference, or just suck more gas. The motor is entirely stck, including the factory flame arrestor.