Was spoofed in Loose Shoes....
I hadn't heard of this movie until the lead actor died recently. However, in the sketch comedy film, Loose Shoes, there is a character named Billy Jerk and I had been wondering who he was based off. Well, after looking into this film, it seems I found my answer.
I recently wrote a small blurb about it on my site, but if you just want to see a side by side comparison of Billy Jack and Billy Jerk, here you go:
http://audiopinons.files.wordpress.com/2013/12/billy-jerk.jpg
The sketch in question is called "Billy Jerk Goes To Oz" and seems to be a spoof combining this film and The Wizard of Oz.