considering my 4200 lb 2011 charger R/T is a ~13.7 second ride in the quarter mile with the A580 auto and 2.65 rear gears, I'd love to take a bone stock 2009-up 5.7 eagle motor and put it in my duster with it's current gearing of an A833OD and 3.23's....would easily be a 12 second car, that on the highway would get about 27-28mpg....