The Invasion of the Dead (1973)

No sex or nudity.

There's absolutely no gore or graphic bloodshed in this movie, there's only a scene where a man can bee seen lying on the ground with a little bit of blood on his face. There even isn't anything that could be considered as violent, a few zombies get shot without getting wounded. The wrestler Blue Demon and Zovek fight a few zombies, which looks more like wrestling. If the movie would've received a rating it would probably be PG, for mild violence.

The undead are unconvincing, they didn't add any make up effects which show decay. However a few of the zombies can be seen having scars on their faces, the Blue Demon fights 2 zombies which look like they're suposed to be werewolves. Including fake teeth. The only scene that comes close to being frightening is the moment when the dead rise from their graves..