Nestled in the Motown discography between Diana Ross’ “Ain’t No Mountain High Enough” and The Four Tops’ “Still Water” singles in 1970 was a curiosity: the major label debut of the popular Jamaican singing duo Bob and Marcia, a.k.a. Keith Anderson and Marcia Griffiths.  While the 45 with “Young, Gifted and Black” b/w “Peace of Mind” didn’t dent the charts in the U.S., the A-side had made it all the way to No. 5 on the U.K. National Charts.  Now, Cherry Red’s Doctor Bird imprint has paired the duo’s first two Trojan…