What is your favorite iconic engine?

For me it's the Mopar 440, specifically when equipped with the 6 pack (or 6 barrel). I know its not as powerful as the hemi but there's just something about the Chrysler 440 that seems so cool to me. It's the ultimate 60's engine in my mind, not the best drag racer certainly, but its just got so much character. Of course many of my friends regularly question my sanity so I'm maybe not the best judge.

http://m.youtube.com/watch?v=5ZrXX3HdxVY

http://m.youtube.com/watch?v=5ZrXX3HdxVY