The non racer fans will lose more interest then existing Pro Stock has now. Like said before, more people leave the stands for beer/soda, hotdog and a Top Fuel T-Shirt as soon as Pro Stockers start running.
I would also think it would like asking the Pro drivers to take a huge step back. Like asking a Jet pilot to fly a prop plane...
From the racer side this all sounds like a great class that I would enjoy watching!