"...I guess there's no way to externally tell a 67 RA Firebird from a non-RA?...
I assume the scoops would have to be open, on the RA car, but sealed off on a non-RA car ?
I have some pics of Randi Lyn Shipp's '67 Stocker which APPEAR to show black holes, possibly indicating that the scoops were open. Another pic shows 'em closed & painted white. The past couple of years or so, the scoops appear closed & painted light blue.
I suppose with the current weight changes allowed, you could still run 3 different classes with it, opened or closed. Assuming they concluded that having the scoops open was not worth the extra weight they had to carry. It's now 338hp vs 352hp.
http://www.classracerinfo.com/Engine...5&MAKE=Pontiac