ARGH!! Please HELP! Truck No Start AT ALL NOW!!

[TIMSPEED]

Well, I have NO idea why. But for the past couple days, the truck hasn't been starting. Finally, tonight when I went out to try it. I turned the key and it did ABSOLUTELY NOTHING. The lights came on fine and everything, so I know it's got battery power. But when I turned the Key to fire it up, the starter did NOTHING. No buzzing, no clicking, NOTHING. Any ideas? Also, if anyone's got a picture of what wires are supposed to go where on a 75+ Small block starter, it would be GREATLY APPRECIATED! (The Haynes/Chilton manual only has a picture of a small block starter up to 74, it says they changed designs when HEI came out.) Thanks guys! (I KNEW it couldn't be in my ignition!)