Before anyone says anything, I love The Exorcist so much but it doesn't count because it was never formally banned. Also if my behated old catholic school cited it positively, as well as a lot of the clergy, then that's a wretched enough reason for me to revoke its rights to be blasphemous.
(If you want a 1973 horror that got banned, watch lemora or the original wicker man. Watch my movies, boy)