Going back a few years, guys like Jr. Johnson used the tubes of the roll cage to hold an extra gallon or so, but the tech guys at Nascar have seen all these tricks now, so it isn't likely anyone could pull something like that again. Speaking of smaller carbs, even Holley has gotten in the game. I recently read an article that show an engine actully pulling more HP w/ the 650cfm Avenger Holley than w/ their own 750 performance model. I'm sure there are lots of ways to finagel MPG w/o losing too much HP. And, I'll bet most of the big teams are working on it too!!!! Go Ryan, Bill, Jeremy, Jamie, Rusty, Sterling, Kyle, Jimmy, Ward, & all the rest of the Dodge gang.!!!! Ovmf