Back in late 67 a couple Factory Racers were given 68 Barracudas with a 383 package. They were told to stuff a 440 in them. I remember when Vanke did his. It was a black notch car. After they took them to Detroit for the factory to see, to prototype a M code factory car, they let Arlen keep the car. He sold it to a local street racer and it did very well on the drive-in circut.