Demon and Dart Sport Scoop Location

A friend of mine was the original owner of the 1973 Dart Sport 340. When he bought the car new, it had the holes under the scoop, a few years later, he opened up the entire diamond section under the scoop for more airflow. Later, he changed the hood completely for one with a Pro-Stock scoop on it... I know, I know but it was the 1970's at the time. ;)

I wonder if Dodge did sell different hoods depending on where the cars were being sold. Perhaps wet or snowy climates had an option for the holes to prevent water/snow/etc from getting into the engine compartment? Just a guess although the fact that my buddy bought his new here in the snowbelt with the holes kind of shoots my theory out of the water...