I was 19 at the Time...
This movie was out but don't recall it ever being shown locally and we had two theaters and a drive-in at the time.
In fact most of these R-rated 60s and 70s movies that show up on TCM I've never hear of and I used to pride myself on being fairly knowledgeable about movies.
But then had they been shown locally I probably wouldn't have gone to see most of them anyway!!!