Nice find! There’s some discrepancies, Earl has blue eyes and his disappearance date is a bit of a stretch.Not very sure, but I found some similarities with Earl Lee Dannels (especially his lips eyebrows -I think there's a scar too- and nose)
Earl Lee Dannels
BTW, he doesn't have a thread in Websleuths.
Earl went missing in 1969 and our doe was found in 1978.