Master of the Flying Guillotine (1975)
If you want to see the quintessential dubbed over kung fu movie from the seventies - watch Master of the Flying Guillotine. It is great. Nothing more than the basic vengeance plot and lots of kung fu, finished off by the final climax fight scene. You have to see some of the amazing things these kung fu masters can do (e.g. stretch arms out 6 feet to punch). A movie like this is great to watch for a look at the genre's style and not to be taken too seriously. It is a "bad" kung fu movie that is good.