350 V8, 4 bbl rochester, SM-465 4spd, Np205 T-case, 10 bolt front, 12 bolt rear w/ 3.73 ratio, 31x10.5 -15 tires. 15 mpg is my Highway average as I drive 250 miles one way to work every week (stay near job during the week then drive home on weekends). At least till I move at the end of this month. So if anyone wants to come to Central Oregon and clean out all my parts trucks out of my yard I am giving away alot of stuff I dont need just to get rid of it (RV chassis, 77 K20 Frame and leaf springs, 73-87 front bumper, 57 IHC Dump truck for parts, 1984 suburban diesel radiator, um...) cant remember everything... need to make a big list.