the.gods.they.made, they played Spanky Wilson's version of Sunshine Of Your Love a few times - quite a departure from the original because it is very 60s soul but it maybe the song you are thinking of?
That version is by Michael Viner's Incredible Bongo Band. I read about him in Mojo magazine a few years back and got one of his LPs, Bongo Rock. It's all instrumental and I wouldn't recommend repeated listenings, purely because it can all sound a bit same-y after a while, but some of it is incredibly groovy. So many DJs were sampling it at the end of the 70s that Michael Viner is often considered (as a lot of people are) to be one of the significant figures in the origination of Hip-Hop.