Cruise friendly low 12's with a 340 Dart

Mid 12's and streetable, Hmmmm. I got that. pump gas 383, 300 converrtor, 4.10 gears (with 28 inch tall tires). Still get 10-12mpg if I try hard. Good for everything but the freeway. And when the need be, there's the chemical supercharger in the trunk that throws in another 150hp. Now if I had a smallblock and the 518 trans was available,.......we'd go that way in a heartbeat.