I live a short drive from Lakeside International Raceway (where those photos were taken), and my Dad was actually at that race meeting. He took some 8mm film of the meeting, and the sight of Ken Miles drifting CSX3002 through the fast right hand sweeper is truly spectacular.
Unfortunately, there's no sound to the film, but Dad always tells me how the Cobra was the noisiest racecar that had ever been on the track at Lakeside. He recalls the feeling of the sound out the sidepipes actually pounding at his chest....