14 mpg with my '71 Barracuda, 3.23 gears and Holley 750 vacuum secondary. 3.23 gears.

11 mpg with my '63 330. 505", 850 DP and 3.54 gears.

'63 Dodge 330
11.19 @ 121 mph
Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs.
10.01 @ 133mph with a 250 shot of nitrous an a splash of race gas. 1.36 60 ft. 3,700 lbs.