Just a couple thoughts I have
Even if you make an all run "mopar" NSS, you will loose most if not all Hemi cars because of the tire rules.
IF you bring in the "X" cars you will loose the class sponsors that are mopar only vendors.
IF you want an all makes NSS, run it on Sat only instead of the class run-offs. I hate those anyways. Run the car 3-4 rounds for a trophy, big deal. Make it worth something, $50 entry for a $2500 purse based off 50 cars or something like that. Now lets hear the about it already cost enough to go to a classic race.....
Dan Brewer