'72 Dart Demon production numbers for Devil kit

I have a '72 Dart Demon with the dealer added Devil kit. It has the dual hood scoops but also a tachometer (in small scoop) on the hood and a go wing on the trunk. I am having trouble finding production numbers on this car. I can find the production numbers for the "Demon" but not the dealer add ons. I can't even find ANYTHING on the devil kit at ALL!!! Maybe it was called something else? I know it is a LM29 but that doesn't get me anywhere either.
We actually have two '72 Demon's...one the hubby and I drove on our honeymoon and the other one is a straight 6 "donor car".. We bought it since the 340 car got hit in the rear and damaged the tail lights.. need I say more about that? Ehhh!!! So, any help would be greatly appreciated!!