Need recommendation for a Carb for better MPG!

I never built specifically to get mpg, always performance. But, the mpg came for free with the better efficiency. With a TQ you got both in spades, if you could stay out of the secondaries. You can easily get into the 20's with a gear change. I always had, and still do, have a 2.76 pumpkin for long distance driving.
Efficiency sounds good to me!