He was in a soft core porn flick in the late 1960's-early 1970's

I saw it at a drive-in in 1976, just after RMPM put him on the map. Sure enough, his name was in the credits. I can't remember much about the movie except that it was a typically bad print, and the title was one word, the lead female character's name. It was sort of like a Russ Meyer-type movie.