Alternatively, could this be a misunderstanding or a misremembered title? The user might be conflating different media. Let me think about notable 1976 releases. The X-rated musical fantasy Alice film... Hmm. Maybe it's a less-known production. Also, "X rated" could refer to the X-rated music label or some other certification.

Wait, perhaps the user is thinking of a video tape version with an X rating due to explicit content. In the 70s, some home videos had X ratings for nudity or explicit content. If there's an Alice in Wonderland film with sexual content presented as a musical fantasy, that could be the case. But I need to verify.

I remember that there was a 1978 horror film called "Alice, Sweet Alice" sometimes confused with the 1976 one the user is mentioning. Wait, the user mentioned 1976, and the title has "X rated musical fantasy." Maybe there's a different film from that time.