any body building a mopar for max mpg?

any 4 bbl uses less gas then a 2 bbl.when your foor isnt in it,,,lol
the thermo quad is a great carb,,small primaries,, very large secondarys, but to big of a carb cfm wise for most stock or mild 318,s..i use a 500 cfm carter/edelbrock AFB carb on a 241 C.I. dodge red ram motor in my street rod,, 323 gears,, 18 mpg at 80 mph with the a/c on,,