I just bought a 79 Chevy 1 ton Dually 4wd, but I haven't seen the truck yet. It is a 350/4spd truck, not sure on Tcase. Someone told me that alot of the 1ton's w/ a 350 are 4.56 gear trucks??? Does anyone know what gears the truck most likely would have? The guy selling it doesn't have a clue, and the curiosity is killing me since I can't go get it for a few days.