Okay....I hope that I am not imagining this, but...
As a kid, I thought I remembered seeing a Chevrolet Truck TV ad where they had a truck suspended from a crane. They dropped it to show how tough the chassis was. I know Ford had a similar ad, Dodge did too.
I've searched YouTube but cannot find it. Does anyone else remember this? Dad sold Chevrolets in the 70s and I remember him bringing home brochures and sales literature on the new cars. It was pretty cool as a kid. He used to get trucks as his personal vehicles. One was a 2 tone 1/2 ton Short/Wide with hubcaps.....and a 454 ! I remember him power braking it at stoplights! Good times!