Sir Christopher Lee has said that he had no idea he was appearing in this movie. He said that he was hired by a different producer to narrate a different movie, and that the producer apparently sold Lee's footage, without his permission, to the producers of this movie, who then advertised it as "starring Christopher Lee". He initiated legal action against this movie's producers, but withdrew it when he was advised that it would be a long, drawn-out and expensive procedure.
Early in the film The Roxy Theatre can be seen dressed out for the live production of 'The Rocky Horror Show'. The show premiered at this location in Los Angeles on March 24, 1974. The show had a 9-month run, ending on January 5, 1975. Filming for Meatcleaver Massacre took place in May of 1974.
There is a poster in Dirk's (Doug Senior's) room featuring Chico Marx, Groucho Marx, and Harpo Marx.