here's a new post from Roger down running the 500 -
"The new experimental H.A.D. driveshaft is working great. I have put about a 1000 miles on it in the last week pre-running and it still has no vibration at all. I usually have to change the drive shaft atleast once during pre-running. I have a good feeling those days are over.
Today I broke my I-beam and tucked my tire along with the tie rod under the truck. We pulled the wheel and tire out from under truck and put it back on after welding the end of the I beam back on. The king pin collar had been damaged in the past, we could tell by the old rust on the break. The only big hit I have had on it was hitting a tree one night before the 2008 Baja 1000 with BJ. Kind of scary to think that it may have been cracked that long ago. We were doing about 80 mph when it folded under. I knew imediately it was something major when the truck decided to leave the course on Mr Toads Wild Ride. That was the last thing I was expecting.