Even though it was raced as a private entry, Mitchell was pressured by GM to withdraw the car from competition in accord with the AMA ban. He eventually acquiesced, and the Stingray was retired from racing. It then underwent a series of modifications. Some of the changes requested by Mitchell included a full-width windshield and a passenger seat, making the car legal for use on public roads. This allowed Mitchell to drive the car on weekends as his personal vehicle. The modified vehicle was also exhibited as an experimental show car even while Mitchell continued to use it. After its career as a concept car was finished, it was retained by the GM Design Studio as a historically significant vehicle.