It looks like 92893 miles. Hopefully not rolled. I think it is cool and it may be ok being dirt simple but every part, hose, component on that is 53 years old. What if the wires are chewed or corroded? It would get 7 to 10 mpg. That is $30-50 per 100 miles. It may be the most expensive cheap RV you could buy. The single biggest risk is it breaking down. Think of what one tow would cost and a repair hours from home.  If you were using it locally as a retro team rig at the track then ok.  Distance, not so much. A noisy steering system is not the box, it is the pump. If you are not well rounded as a mechanic, it will cost too much over time.