That western music in Super Power, I've also heard in at least two movies that preceded it; The 7 Grand Masters, and in one version of Along Comes the Tiger. Many of the men credited for the music in old-school kung fu films actually selected various tracks from pre-existing American, Italian, British, Japanese, etc., movies; or library music, such as Shaw Brothers' use of DeWolfe library tracks, as opposed to composing original music. And some movies, such as Way of the Dragon, had original music by Joseph Koo, but also lifted tracks from Billy Jack, Once Upon a Time in the West, and I believe another/others.
The track in the clip from The Woman Avenger, I've also heard in; The Master and the Kid, Ape Girl, and Kung Fu of 8 Drunkards.
I've found the sources of many tracks in the old kung fu movies, but there's a few, including the two examples given, that remain elusive.