1953 Kenworth Bus Roadtrip! Will a 70 Year Old Bus Go Across The Country?

My Dad has a Kenworth Pacific bus powered by a Cummins 12-valve 6BT that he used to travel across the country with.  That was about 20 years ago.  I'm going to see if it still can make a long journey, so I flew my family one way across the country and we're going to try to drive it over 2000 miles home!