I met the guy that owns that Duster at the Nats this year. He has since built a 360 for the car but he said the 318 ran
really well. I love the car and the sound of that Whiplash. Here's another video. As you can hear the cam smooths out with a slight rpm increase but idles with a nasty lope.
http://www.youtube.com/watch?v=9PN8Cr0h1G8