New answers tagged horror
This sounds like O Lucky Man!, a 1973 British horror film. The synopsis here includes bits about human heads on pig bodies as well as several other of the plot points you mentioned.
About the only face melting woman movie that I can think of is The Terror, a 1963 movie with Boris Karloff and Jack Nicholson. Ending spoiler
I was watching the video of the assassination of JFK tonight and the street where it happened was called Elm Street, which may bring back the memories of the people who lived in that time and for those who follow history. Could be a clever way of marketing a movie title.
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