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.
Even though it was entered into racing as a personal vehicle, Mitchell was coerced by GM into withdrawing the Stingray from competition due to the AMA ban. Eventually, he relented, and the car was removed from racing. Following this, modifications were made.