On the wall in the jail, the wanted poster for "Ben Silas" is the same prop seen frequently in Gunsmoke (1955).
Though not a sequel nor related to this storyline, this movie was followed by Support Your Local Gunfighter (1971), with most of the cast intact playing similar characters.
This movie was made by the Artists' Union as a way to keep many of the writers, actors and production crew working. James Garner was the only person involved with the movie who made more than scale. Fans of films and television of this era will recognize literally dozens of familiar faces among the character actors in this film, which makes the film seem like a actors benefit.
The bordello named "Madam Orr's House" is an interesting play on words; it appears to be a subtle dig at William T. Orr, a Warner Bros. executive who produced James Garner's TV series Maverick (1957) and with whom Garner had a contentious relationship because of conflicts over unfair contracts.
Walter Brennan's part was a spoof of his part in My Darling Clementine (1946), in which he was head of the Clanton clan.
Joe Phillips: [BARFLY] This is one of numerous western movies and TV shows where Phillips played a barfly. Another one is Rio Bravo (1959), one of the main movies being spoofed.