A minor update on this.
Have, since last post ,added about 20 + acts to my collection.
Most notably "Magic" by Pilot,Chevy Van by Sammy Johns,Did You Boogie With Your Baby (etc.) Flash Cadillac & the Continental Kids.
...and! a song I "really" should have had
since 1979....."Ain't No Stoppin' Us Now" by McFadden & Whitehead.
I've also got below 130 Seventies Top 40 left to find overall.
Anyone familiar with Charles Wright & The Watts 103rd Street Rhythm Band?
I just got a "best of" cassette from Amazon,which includes all
three of their "pop" chart Top 40 hits and many other charted singles as well.
Pretty good stuff and I understand Bill Cosby
was the one who discovered them. Good work Bill!.