I would be tempted to vote "Here at the Western World" as BOS, but I don't think it was released until 1979 on the first Steely greatest hits comp. Unless it was a B-side or something--anyone know?
ETA: AMG sez it was from the Royal Scam sessions, so it may have been recorded around 76, but not released til 3 years later. So I'm not sure how it qualifies in a '76 set. No release=no airplay & no chart action.