I couldn't find any clips of Ultimate Spinach or Beacon Street Union, two psychedelic bands out of Boston in the 60's, but that's what's great about Youtube - you keep running across amazing things while you are looking for something else.
Two of my bands sang this with a higher harmony on top, showing our CSNY/Pure Prairie League influence. Great stuff. Watching the video, it seems that the bass player has some talent. The drummer, however, looks like he has some sort of congenital illness. Gotta watch the drummer, Ben.