i put on my scratch acid - s/t ep and it was on 33rpm instead of 45rpm. First track Cannibal starting playing and it was THUNDEROUSLY EERIE and would make an INCREDIBLE Melvins cover song.
So thats my vote
Scratch Acid - Cannibal (slowed)
some others
Tom Waits - I don't wanna grow up
Neil Young - Cortez the Killer
Wipers - Potential Suicide or Over the Edge
Yardbirds - Heart full of soul
Bad Brains - Sailin' On (slowed down)
Beatles - Helter Skelter (slowed down) or Yer Blues
Black Sabbath - Snow Blind
Sleep - Dragonaut