Eddie Boyd - "7936 South Rhodes" (feat. Peter Green, John McVie, Mick Fleetwood)

This particular blues album from 1968 was my first exposure to Fleetwood Mac representing as a late-'60s British blues band rather than a mid-'70s pop-rock act, a side of them that at that time was completely unknown to me. It's pretty amazing that they chose to record an album with (by blues canon standards) the relatively unknown Eddie Boyd, who was a fantastic blues pianist and composed a number of classic tunes, most notably "Third Degree" (written with Willie Dixon, I believe) and "Five Long Years".

Peter Green is amazing on this one, which is mostly molasses-slow blues throughout. I'm not sure how easy it is to come by--I picked it up on vinyl ten years ago somewhere in Chicago--but if you can find it, buy it!