Lonnie Mack - "Live - The Attack of the Killer V". I didn't know this existed and just found a copy this week.
Stunning guitar and vocal work from Stevie Ray's hero. Lonnie and Link Wray both amazed me back in the early sixties as being far ahead of their time.
This is the 1963 Link Wray LP that did it for me:
Had the Swan original LP, lent it, never got it back, took many years to find it again as a Line Records reissue, and finally also on CD. A must listen for guitarists interested in the history of rock guitar, I think. Just listen to "Deacon Jones" and compare to anyone else from that era.
Fortunately someone has posted it on YouTube: http://www.youtube.com/watch?v=Jys32du9kAo