If anyone has seen a 1970 340, 440-4bl, or 383 'Cuda or Challenger with a shaker hood, it was added on by the owner after the car was built by the factory.

You could virtually order any parts from Plymouth and Dodge. I wanted the backlight louvers on my 1971 'Cuda but they came as a package with a black vinyl roof. I didn't want the vinyl roof, so I ordered the louvers through parts (for about $120) and installed them myself. They really looked great on a Rallye Red 'Cuda with black billboard stripes.