It depends on condition, mileage and previous maintenance.... not so much how old the vehicle is..IMO.
We towed a large folding trailer with am 18 year old Chev Impala. Our trip was across the Canadian prairies, BC to Vancouver Island and back...through Washington state, Idaho, Montana and North Dakota.
The Impala was a '76, 350 V8, RWD, THM 350 transmission.
No problems .
But the car had been in the family since new, low mileage, extremely well maintained.
Have a good mechanic check whatever you get....first.