Elvira's Macabremobile was created for the film. The 1958 T-Bird hard top was purchased for $2,500 and went through $7,000+ in alterations. The car has remained in the possession of Cassandra Peterson, who continues to use it when she does personal appearances as Elvira.
Cassandra Peterson's personal hand and body double for the film was Susan McNabb who was later assumed to be Cassandra's sister at hundreds of Elvira's public appearances. Susan retired as Cassandra's personal assistant in 2005 after nearly 20 years.
The Las Vegas scene was originally ommited from the shooting script because NBC executives thought it would be too expensive to build the set. So the film was shot and editied without it, and then screened for NBC executives to decide on whether or not to fund more money for the Vegas finish (which Cassandra really wanted). Ultimately, executives liked the film enough to fund the Las vegas scene. The scene was shot a month later in a warehouse in the San Fernando Valley, but some parts of the song and dance were cut from the final film.
The tar that Elvira is covered in at the end of the Flashdance (1983) spoof sequence was actually black paint. Because of the time required to clean the paint off Elvira and her costume, this segment was only shot once.