Horse Latitudes by The Doors
There is also an excellent spoken part in The End.
And what would a list of songs with spoken parts be without The Beatles' Revolution 9? A nine-minute intrumental with random voices- what more would you ask for.
And a few songs on Porcupine Tree's Signify have spoken parts: Intermediate Jesus, Bornlivedie, Signify, Idiot Prayer and Dark Matter.
at the end of Dark Matter:
"You've just had a heavy session of electroshock therapy, and you're more relaxed than you've been in weeks. All those childhood traumas, magically wiped away, along with most of your personality!"
Although I doubt anyone is very familiar with Porcupine Tree