I DL'd a copy off teh Torrentz and made a DVD a few years back, but now I'm in the middle of a move and have already packed up all the DVDs and put them in storage.
But I searched last night, and the pr0n site "Xhamster" has the full movie up.
The sex is totally softcore, though there's visible dong in one or two scenes.
Yes! 1974, a full 3 years before Star Wars!