What makes this photo so great is a strong likelihood that no one arranged for the red hardtop Mustang (probably a ’65 model) to be cruising east at the corner of Sunset and Clark at this very moment. And even if someone did plan it, it’s kinda mindblowing that the Mustang and the Whisky are almost exactly the same shade of red**. This was probably taken sometime between 5.19.67 and 5.21.67, which is when the Byrds were headlining and the Doors were the openers.
** Yes, the Whisky red is a tiny bit earthier…a faint touch of brown.