The moment I seen the pic the first thing I thought was California Special, I became aware of the California Special from a magazine article about five years ago.
Friend in high school had a California Special. White coupe. Don’t remember the engine. Only one I’ve seen in person that I recall (maybe at a car show seen others?).
And another guy (car club) had the nicest ‘67 (IIRC) GT500KR Shelby Mustang I’ve ever seen. Drove it to a meeting. Looked brand new (late 1970’s). Even rarer, it had the 427 while most were 428’s if they were big blocks. Beautiful metallic blue.