Back in the early 60’s I went to and worked at the SCAA races in Danville Virginia.
The big deal car was the Corvette. It was to put it mildly, a loser. It could run fast on the long straightaway but spun out in a curve. The Shelby Cobra could clean it’s clock.
The real embarrassment was from cars in the next lower class. They could also beat the corvette. It was an American embarrassment. All show, blowhard, looks.
One day a new car showed up....... the Datsun. It beat all comers. The Brits, the Italians, the Germans. It was technology and engineering on a world beating scale. There was no American car remotely capable of beating the Datsun.
American technology might have created tail fins and dual head lights and what ever but where the rubber meets the road, it was lacking.
No "Datsun" ever sniffed the rear bumper of a kick ass Mustang or Z28 in the Trans AM series.