Carburetor size Question

Thanks for the reply Rusty. How would a double pumper do in regards to economy vs. say a Demon or AVS style carb?
I would like to balance economy and performance. Gas prices are ridiculous and I want to drive the truck a lot.
Maybe a spread bore would work best for you. I think they sell them in a 700 - 750 and that would work good too. Running on the small primarys when your foot is out of it.