Best magnum MPG?

Been building carbs since the 70's. Thermoquad is a Great carb if you understand how carbs work. Q-Jet is as well. Problem is too many that don't know,fool with em and turn em into junk. TQ needs an insulating gasket and no more base warpage.. Which wasn't that common until later years as temps climbed or a hot climate. Q-jet is a little better and stingier with its metering.It uses n insulating gasket,But the wrong one for your application can cause idling problems. Also small fuel bowl makes it hard to feed a good running bigblock. it can be done,but needs a BIG needle and seat. TQ,Passes more gas,,Dual bowl and .110 seats work well. The new Street Demon is a good attempt at a TQ copy,But only 650 cfm. Better and more durable bowl design.