A few people seem to think that the film was shot in the mid 70's but it was definitely shot in the early 1970's - It started in either 71 or 72 as Freedom RIP and then continued sporadically from then on.
How do I know? I was in the Northville cemetery in Michigan a couple of times while the filming was taking place as I was then dating one of the filmmakers. I moved to Australia in July 72, so it was definitely before then!
If the acting isn't the best, then that's because those guys were not actors; they were actual bikies.
If the acting isn't the best, then that's because those guys were not actors; they were actual bikies.