Don,
Remember that Gibbs started with Pontiacs and then they all vanished. Now that none of the cars are even close to any name brand, I don't think they should be called Chevy, Ford, & etc. Just call them the NASCAR Car and forget it. More sponsors are leaving all the time. Bush has sponsored that series since it begin and he is pulling out. Next year Nationwide Insurance will sponsor the Bush series and they will most likely drop it in a year or so. The Nextel Cup will be the Sprint Cup. Although I have always liked road racing better, I have been a big NASCAR fan until about 5 years ago and now I just don't care who wins in their phony set up. When they raced real cars that they had modified for racing it was a lot better racing.
Ron