In the Year 2889 (1967) (repost)

In a post nuclear Earth, survivors are hold up in a valley and have to protect themselves from mutant human beings, and each other in some cases.

Director:

 Larry Buchanan

Writer:

 Harold Hoffman (screenplay)

Stars:

 Paul Petersen, Quinn O'Hara, Charla Doherty - via IMDB 

https://archive.org/details/In_The_Year_2889