Which Carb Gives a Balance of Power & MPG?

Carter made Strip Kits for Thermoquads. They are very expensive when you find one today. The only reason the Thermoquad got a bad rap was because it was used primarily on emmision controled cars and trucks where the under hood temps were so high that it would warp the center plastic body resulting in a leaking and generally bad running carburetor. In a performance application where under hood temps are kept in check, they work very well. People have run them in several drag racing classes with great success for a long, long time. Present company included. There are a lot of them still out there. All I can say is, if you don't like Thermoquads, either you never used one or you never learned to tune it correctly. They are light years ahead of any carburetor made by Carter at the time, including both the AVS and AFB. You should go here and read about them. http://thermoquads.com/