2.5L 4 cylinder that has been transplanted into this machine makes for great pairing. This gives you modern fuel economy and a bit more pep to the step from the original drivetrain. Backing this powerplant is a General Motors TH350 3-speed automatic transmission allowing you to have the dependability and the security of not having to worry about being on the side of a hill with your blinkers on trying to figure out why your truck will not pull your little camper. Built GM tough and ready for the road. Climbing into the cabin of this classic you will notice the simplicity of the 30's, 3 pedals to make you move, a steering wheel and a shifter!