I have one of those trucks. It tops out around 50. I have had it up to 55 once or twice, but it was a little scary. These old trucks just weren't meant to go fast. Even on the best roads around, the steering is kind of vague over a certain speed. The brakes are fine at 45, but at 55, not so much. And that's running empty. With a load on mine, I stick to the side roads and take my time.
