Great pictures, Scott. Thanks for the link. Yes, that is a Joie Chitwood Thrill Show Camaro behind the Mustang, not the race car. The race car used a darker shade of blue than the Thrill Show cars did. Not sure why. It's possible the Caprice and Corvette behind the Mustang were also cars that the Chitwoods brought to the track. In some of the other pics at your link, the Mustang has a Ring Free racing team decal on the door and the Ring Free team had a bunch of female drivers entered in the race. The ladies had black sweaters and the person in the car appears to have a black sweater across her lap. Donna Mae Mims was one of the drivers on that team and the woman in the car is wearing pink like Donna Mae always did, however I don't believe her hair was quite that long at that time.