FIREWALL
Alterations prohibited unless expressly permitted in this section.
Firewall coverings prohibited. Where heater/air conditioning units
have been removed, area must be covered with minimum .024-inch
steel or .032-inch aluminum, including rear hood seal/flange, as on
GM A-body. Minor firewall modifications permitted to C5 and C6
Corvettes for transmission installation. See General Regulations 7:4.
BODY
Alterations or customizing prohibited; extent of customizing is
limited to paint only. Convertible-top cars must run with top up.
Sedan delivery, Ranchero, El Camino, etc. (if found properly
classified in the Classification Guide) are eligible only if all class
requirements are met. Raising and/or lowering front or rear of cars
prohibited. Cars must retain level attitude at standstill, except those
that have a forward rake (a permitted modification). Bottom of
rocker panel cannot be higher than centerline of rear axle. Body
mount insulators may be replaced with solid mounts of same size.
Aluminum or other lightweight material may not be used to replace
heavier items on car. In front-wheel-drive vehicles, air dams and
spoilers that were available through the manufacturer are permitted
front and rear.
Unless someone see's something else? All body panels need to match year claimed. The glued on side molding should not be an issue, if its on or off. This info is out of the Stock section of the 2012 rule book
Sean