MPG: steady 19-20, calculated by topping off the tank before and after 150-mile round trips
ENGINE: 350, lightly-ported heads, Offenhauser split-port intake, Holley 650cfm spreadbore double-pumper
TRANSMISSION: TH350 with a shift kit
REAR RATIO: 3.08, but with 33" tires
2WD/4WD: 2wd, but with tires you usually see on 4wd trucks
YEAR OF TRUCK: 1979
DRIVING STYLE: freeway, steady at 2000rpm, about 60-65mph
Reason for good fuel economy - small primary runners of intake and small primary bores in carb make for very high air speed thus better cylinder filling and better fuel atomization. Oh, and about three months of weekend fiddling with jets and power valves and such. Same setup over the winter nets 15-16mpg, only now we're running two steps larger primary jets, keep it in 2nd, and driving through a raging snow storm
