No, I know. I just looked up images for US racing in the 1960s, and lo and behold there it was - it was August 7 1960, and it was a race held by the Oakland County Road racing Club.
(Further investigation - track opened in 1958, situated in Clarkston, Michigan. Now called Waterford Hills. One viewer of that webpage thought the car was the Sorrell-Manning Special, but I don't think it is, nor is it a Sorrell SR100 body. One to ponder over.)