"To my eye the "Laguna Trans-Am" photo that I previously commented on and this photo show several of the same AS (and BS) sedan racers and may be the same race. 

This photo shows an AS and BS field of cars including Ron Grable's Dart partly obscured by the berm near the front.  Don Peck's yellow #4 Mustang identified in the "Trans-Am" photo is also in this group, as well as a blue Falcon with white stripes and a couple blue Camaros (same two from JHawes013?).  At the rear are a Cortina, BMW 1800, and the #67 blue BS Porsche 911 also shown in JHawes0062 and JHawes0068.  The #69 white BS Porsche 911 with red stripes on the rear deck is leading #67 and Grable in JHawes0068.  I think that the white #69 Porsche is the one shown in the TransAm picture, which also has green grass by the way.  I don't know the driver of the red #11 Camaro in JHawes0061, but I noticed that the rear fender appears to say Ellis Brooks Chevrolet, a San Francisco dealership."