Premature engine failure on a new High performance car or truck is not uncommen. As Cannibal said the truck had over 300 miles at the time he bought it. I have heard that when these types of vehicals sit on the lot, some people will jump in for a test ride, start the cold engine and floor it. I've heard of this causing engine failure in new Vettes, and Vipers. It's up to the dealer to prevent this.
When I went to buy my Dodge Magnum SRT8, the dealer would not even let me drive it without showing them I was a serious buyer. When we went for a test drive, they started the car and made sure it was up to normal running temp before I was allowed to sit in it.
Who knows who opperated Cannibals truck before he bought it, it could have had some hard tire kicker miles put on it.