Curse of Bigfoot (1976) (repost)

Original film was called "Teenagers Battle the Thing" made in 1958. Approximately 59 minutes.

Director:

 Dave Flocker (as Don Fields)

Writer:

 James T. Flocker (story)

Stars:

 Bob Clymire, Jan Swihart, Bill Simonsen - via IMDB 

https://archive.org/details/CurseOfBigfoot