The engineers were probably Carl Jack and Lee Otteson. Kenny Faucett was the senior narrow gauge engineer back then but he usually ran the Antonito Turn, a narrow gauge train even though its was standard gauge and diesel powered.
Eldon Morgan also may may been one of the engineers. Harley Gilliard was the conductor on the last run a couple of months later so he may have been on this one as well.
I wouldn't know who the brakeman was. Dennis Cummins was brakeman on the last run. He was a Durango man that worked in Alamosa during the winter.