Mystery solved. They were radio djs in the 1960s/1970s for KSAN Jive95 in San Francisco.
Norman Davis and his wife Marsha live on a five-acre spread outside of Taos, New Mexico. Norman is heavy into gardening and still produces features and programs for radio. Midnight Flyer, is a weekly blues show, streamed, podcast and broadcast on a small network of stations. Another weekly Davis-produced show is Low Flame Blues. He also writes for several periodicals and last year became a Publisher & Editor of The Carson Curmudgeon, a humor and local history magazine in Taos County. He is Webmaster for this site and radiothrills.com, which features old photos, stories and airchecks from his half-vast collection. Norman has digitally archived most of his stash of KSAN tapes and hopes others with tapes and treasures will contact him so that these historic artifacts may be preserved for future generations, who may have no idea what "free-form radio" means.
Bob McClay carved out a nice living dealing antiques and estates after KSAN. He also put in some radio time on "The Big Band Blend" in San Rafael. Bob suffered from several ailments including diabetes and in April 1999, he decided he was tired of all the needles, dialysis machines and medications and quit using them. He died peacefully at home on May 9, officially of complications from diabetes. He was watching his favorite old movies and chain-smoking right to the end. Read his obit here.
Thom O'Hair died on January 8, 2001 in Eugene, Oregon, of complications from a stroke. He was 58. One of Thom's unaccomplished ideas was to create a huge data base of everybody famous, which would provide almost instant obituaries to stations, in case of a famous death. He planned to name this scam, "Radi-O-bits". Read Thom's Radi-o-bithere
1976: McClay, O'Hair, Wild Bill Scott & Norman
I hope this brings closure to all of us who have been wondering. RIP to those who have passed.
*I still don't know where I stumbled upon the original pic from.