Probably too gruesome. I remember there was also a much-reproduced photo of Lucy's being staked wherein Peter Cushing was driving the stake into literally a pool of blood soaking Lucy's gown. As I understand, this image appears in no known cut of the film (the rumors about "beefing up" the gore content of their films for the Japanese market seems to have been debunked as fiction).

On a related topic, I have read accounts of Dracula's resurrection scene in Dracula Prince of Darkness wherein the original script called for the suspended victim's head to be lopped off completely and dropped into the coffin, something the British censor would not allow (and, frankly, it sounds excessive to the point of parody).