Running the pony cars in the Cup series would require a rule change. Currently, the Cup series is restricted to sedans, but that's not a major obstacle. NASCAR vice president of competition Robin Pemberton pointed out that, in 1998, the Cup series featured only two-door cars. Clearly, the current rule requiring sedans wouldn't be a deal-breaker, should NASCAR and the car makers collectively opt to move in a different direction.
Pemberton also said that any move to cars of different design would require aero-matching of all four models at the same time, similar to the process used in approving the new Nationwide cars.
Another unknown is how the new management at General Motors might view a potential change.
“I think a big part of our challenge is to work with NASCAR and to work with our leadership to find the middle ground and hopefully get more toward what our guys would like to see in terms of Chevrolet identity,” Suhy said.