1979 F600. Factory 4 wheel drive. 5 speed manual. Rockwell differentials. 6.17 ratio. Cab mounts are solid. Fender have a few small rust areas. Interior is ratty. Double frame is really nice. Have 6 military 9.00x20 non directional wheels and tires included in sale. 370 2 barrel. Motor starts and runs very good. Drives but needs brake work. Rear tires are bad. Six one two.Four one three.Two two zero four.Ask questions before buying.