I have tried to find out more, but for the time being there is not much to tell you. Your dates are correct - the photo was taken when the track was still oiled-dirt, so maybe it was a publicity picture in preparation for the completed track opening in 1953. I'm sure that by then the track was asphalt.
Danny Oakes drove the car at Torrey Pines in September 1952, and I'm taking a guess that this photo was also taken around that time, in other words after the Indy debacle.