Murphy was paid $37,500 for his performance.
James Best, who plays Sheriff Scotty, also played a sheriff in The Dukes of Hazzard (1979), Sheriff Roscoe P. Coltrane.
There are frequent variations on "Do Not Forsake Oh My Darling" within the musical score.
Spangler is based on William Quantrill, a Confederate soldier/ guerrilla leader infamous for his raids in Missouri and Kansas.
This was Charles Meredith's last film as he died seven months after it's release on November 8,1964 at the age of 70.