This is Black Merda (pronounced Black Murder). This is the best release I've stumbled upon in months. Black Merda hail from Detroit in the mid 60s early 70s, and they are the first group of black musicians to sound like this as far as I know. What an unbelievable sound! I'll go gutsy and just claim that this is a fine blend of Jimi Hendrix and Led Zeppelin. I won't say anymore, but don't miss this album.
Black Merda (self titled) (1970) located in comments