Dark Buick in Encinitas, Ca. ?

On the 21st of September (a Thursday night) I was in Encinitas California, just North of San Diego. I met a man who was driving an early 50's Buick, shiny dark paint, a big bock Chevy engine I believe, I think it was a fast back. I think he told me he had a Fat Man front end under it. I did not get to talk to him very long. Does anyone know this man or how I could contact him?