I pulled a 24' enclosed trailer with a full weight Buick Skylark race car, tools, equipment etc with my old 1/2 ton truck. Pulled trailers probably 50,000 miles with it. Sold the truck with 140,000 on it. Changed the oil, air cleaner, etc. Never even changed the plugs.

Sure, a 3/4 ton would have pulled it better, but 70-75 was as fast as I needed to go.

Glad yours handled the trip well.