I’ve driven my 34 chev and 30 model A ford on long runs up and down the east coast of Australia
mid they had more gears like a modern they would not put so much strain on the engine
I’m now conditioned to my modern Toyota Land Cruiser 6 speed tow car that sits on 110kph “70mph” at only 1500 rpm ,hense even hiring a car trailer is a better cost effective option to preserve and enjoy our cars and not be a hazard on a modern motorway