I had a 74 1/2 ton Dodge 318 with 2.92 rear that towing my open trailer with a 64 Savoy on it would gain speed going up steep hills. After the second near miss with trailer sway I went back to the GMC 3/4 ton that was a dog, but safer. No way I would tow anything with a Ramcharger (I had a 1990 one). That 318 really surprised me with the pulling power it had.