 During victory lane celebrations a NASCAR official noticed that Petty's race car had left side tires mounted on the right side of the car, which was a violation of the rules.NASCAR sent Petty's Pontiac into the enclosed Union 76 garage inspection area for a complete engine teardown and detailed inspection.After a four-hour inspection of the Petty Enterprises race car, NASCAR determined the engine in Petty's car was over the limit in cubic inches as specified in the rule book.