I watched a great horror movie some years ago from the late 70s or early 80s. I would swear the case (VHS) had the words "Buried Alive" and "The most violent movie ever made" on the front. The movie was about a funeral home, operated by a crazy woman and a crazy man. Notable scenes included: dissolving a human torso in a bath of acid, eating the remains of a person in a stew, the crazy man ripping a woman's fingernails off with pliers, and the man having a corpse in his bed in the basement. I don't remember the plot, but these scenes should be enough to identify the movie if someone has seen or owns it.

Can someone please tell me if they recognize this film and what the title is?