Performance Hood Treatment for a 72 Duster 340 question.

I was wondering does anyone know what the performance hood treatment looked like on a 72 Duster 340? When I repaint my duster I want to do the Hood treatment but I would like it to be year model correct. I like the black out hood with 340 callout but if its not year correct ill go with out. Any pictures would be greatly appreciated.

Grady