This ought to take another legend down a notch or two

Ever heard of a movie from 1984 or thereabouts called Thunder Riders of the Golden West? Neither had I, that is until I ran across this story in, of all places, the Kerrville Daily News. The film is "a science-fiction western," set in present day that tells the story of Cowboy truckers searching for $3 million in gold during an atomic bomb test. What makes this significant is that scenes for the movie filmed in 1979 feature non other than John Wayne, which would make Thunder Riders, not the marvelous 1976 film The Shootist, Wayne's last film.