Thanks for the lead, John.
Bwv 577 may be the one!!
The piece I remember from the late 70s was a happy sound more likely in a major key rather than 845, which is in a minor key and is so little liked that I couldn't even find a snippet to listen to!!
I listened to a snippet of 577 and while it was an organ piece rather than guitar, it didn't sound "exactly" like what I "think" I recall, but it's an extensive piece, and since it is a fugue, the part I'm familiar with(sorta
)may have even been an inverted portion!
Anyway; thanks for the lead! Sure could be the one at that!!