The truck that Chad Bradley is running is a prototype right from Mugen. If you want to see a pic go to http://www.rc-racing.com
enter the 2005 off-road forum and look through the Mugen 1/8 scale thread. They put some pics up about two days ago so they are toward the end.
From the pics I can tell you it uses axle extenders like the Storm SUT. The chassis has been lengthened quite a bit, the engine looks to be about 1 1/2" from the rear bulkhead. The center diff mount and ring gear look good.
I was hoping they would go the long arm route like the HB LST but it seems to be working well as it is.
Oh, by the way it does have a rear wing. I know so people love that while others hate it.