Old drive-in movie

Late 70s or early 80s movie that had 2 twin identical sisters and the bad sister killed the good sister i a church closet and pretended to be the good sister. Not sure if it is a horror or drama. I remember seeing this at the drive in and fell asleep.

a little off, but “alice sweet alice”?

The film you described sounds like Dead Ringer (1964), but this film is early 60s so it’s not the film you are looking for.