Hillbillys In A Haunted House (1967)
aka: Ghost Party
Country singers on their way to Nashville have car trouble, forcing them to stop at an old haunted mansion. Soon they realize that the house is not only haunted, but is also the headquarters of a ring of international spies after a top secret formula for rocket fuel. Stars Ferlin Husky, Joi Lansing and Don Bowman. Also with John Carradine, Lon Chaney, Basil Rathbone, Merle Haggard and George Barrows as Anatole the gorilla.