I don't know about that. I did see Johnny and June live in 68 in Albuquerque. Amazing American music.
One of my all time JC favorites recorded in 58.
Yeah - the original recording of "Ring of Fire" was by Anita Carter, June's sister. Cash, in a drug-induced sleep, "heard" the tune being performed by the Tijuana Brass and decided to drag the trumpets into the studio.