I agree with Jerry. The limiting factor with driving these trucks, that is assuming all brakes, steering, and chassis components are in good condition is indeed the driver.
Let's not kid ourselves. Driving this vintage of truck at todays highway speeds is loud. If the steering is squirrely at 60, then something needs adjusted. I can drive my truck at 75 with one hand on the wheel. However, my truck gets a full tear down annually checking all components and replace the needed parts.
Just make sure you know what you have before attempting.
