I sat at the table when the NSS class was formed. The whole idea at that time was full bodied 1962 to 1965 big blocks with two four barrels. Big three GM, Ford Mopar. Group started doing match races, index racing came later. I am really surprised how long the class has lasted and how it has grown. I guess for the fans they don't care if it has one or two four barrels. But as a former racer in the class, as far as consistency goes, give me a single four barrel any day. One of the reasons we started the class we were just turned off by the way bracket racing changed racing. Delay boxes, trans brakes, etc. So we wanted to do it the old way with no electronics and pay homage to the cars that started super stock racing. So it is still NSS racing, lot of different year cars have been added, lot of different combos been accepted. But you need to keep the cars unique as possible, otherwise you are just bracket racing old cars.