I was working at the Fabtech show in Chicago last week.  One of the exhibitors had the three sub-assemblies that make up the Next Gen Cup chassis.  Pictured is the center section shot from the right side.  The sub-frames are all bar-coded.  These particular sub assemblies must have been prototypes or rejects because they were marked "not for competition".  I read an article in Speed Sport a month or so ago that said that the sub-assemblies are both robot and hand welded to keep them as close to each other as possible.  I know that the new car is controversial, but I thought 3-widers might be interested in the craftmanship.  

Front and Rear Subframes