My daily driver/hunting/camping/exploring vehicle is a '86 F250, Extracab, longbed, 4x4, carbed 460, swapped in '89 ZF 5 speed, BW 1345, 3.55 gears, and 315/75/16 BFG mud terrrains. Around town, I get 10-11. On the highway at 65 mph I get 14-18 depending on where I am traveling. At 70, it...