The long box proposal has been made before, in fact it was part of the previously mentioned Club Vee class.
The idea of a spec transmission makes lots of sense, and many of the classes like Spec Racer, SS and others essentially have one.
The problem is how do we get there from here?
Jim makes some good points that need to be addressed. Without addressing these items, you end up with a divided class, instead of increasing numbers by bringing out cars that are sitting in garages.
Point 1: There already is a split in the NE. There are NHIS FV racers and then everyone else. There are many reasons, like the good schedule at NHIS and the price of entry fees at Lime Rock. If these drivers will not come to LR (or other track) then they have no reason to go to a long box.
Point 2: If people have a short box only, they will have a hefty cost to move to a long box. (I don't know if the shortage of long R & P is still a problem or has that gone away)
If 10 drivers who are not racing right now would come back because of going to a long box, it would be worth creating a seperate class.
On the other hand if NARRC goes to a long box:
If drivers from NHIS are not going to other tracks, then they are not running in the NARRC Series for points anyway, so you would still have one class, just multiple points races within a race. If you finish 2nd at NHIS but are the first "NARRC" driver, then you would get 1st NARRC points but 2nd NERRC points. Would people be willing to race like that? Is that any different than what is happening now?