The car to be auctioned started out as the GTO Pro Stock development car. It was built by Don Ness in 2005; used as the "master" for body templates for subsequent GTO carbon fiber bodies built by Five Star; was the "submission" car to the NHRA Technical Services Department, which approved the design for Pro Stock racing. Danny Gracia approved the body on May 23, 2005, and the first actual race car was run at Denver in July (Greg Anderson).
The car at B-J is the original wind tunnel test car, turned into a show car by Ness, and later made the show circuit on the Pontiac Performance Tour. At the end of the 2008 show season, it was made available for auction at B-J. I believe that the engine in that car was a GM Performance Parts 502 Ram Jet (fuel-injected), but I don't know what is in it now.
BTW, it was normal procedure at GM Racing to re-use these development bodies for later use as show cars. And, they come in handy when someone at the track complains that the NHRA templates must be wrong. We would just drive the "show car" to the tech trailer and fit the templates. Seems like they fit 100% of the time.
Hope this helps.
Fred