General Motors capped the Camaro’s engine displacement in a way that put it at a disadvantage against rivals — until one Pennsylvania dealer decided the rulebook didn’t apply to him. Don Yenko’s dealer-built engine swaps eventually became a factory-documented option, and decades later the same name resurfaced on a supercharged Camaro built specifically to answer the Dodge Demon. Here’s how a workaround became one of Chevrolet’s most enduring performance names.