I had a 75 W100 (technically it was a W150, as it was the heavier model) other than going through a couple master cylinders (O'Reilly remans) it was a great truck! I sold it a couple years ago and still regret it! Never towed with it though, but I hauled since pretty heavy stuff with no issues. I have a 72 D200 that is going to be the trailer puller.