Milt Brown Special at Cobb Mountain ?
It's Sacramento, not Cobb Mountain, but you were asked to identify the car, not the venue. As you point out, this is the Crosley Special engineered by Milt Brown and designed by Ron Plescia. Of course, these two men are better known for their later creation, the Apollo GT.
Well found. Another point for you!
Here are more images of this car from 1956, this time taken at Arcata, California: