the McCulloch commercial I mentioned the other day when talking about the Dodge commercial that Don Knotts made

and they made the frame so strong that they hung a Beetle from it 

the steering engineering, very impressive! 

14 degree Ackerman steering

the rear axle unit was interchangeable, from single engine, to dual engine

then they drag raced a Corvette for 3 seconds... and the go cart beat it to 45 mph in 2.5 seconds

Racing go carts was serious Hollywood entertainment... I think you all remember the Steve McQueen and James Garner photos  https://justacarguy.blogspot.com/2018/08/steve-mcqueen-bud-ekins-and-james.html they were enjoying cart racing during the filming of the Great Escape