Thank you for posting this album!
Ruth would go onto Frank Zappa's Band, the Mothers & marry Ian Underwood, as you mentioned. She is featured in the finally soon to be released movie of Frank Zappa's "The Roxy" concert documentary, filmed in 1973. It is supposed to be coming out this month! (Hurrah) Ruth had good vibes... Wasn't aware of this early work she had done. Thanx ~