Cowl repair start

Has anyone patched in a new style cowl vent opening? I keep thinking about one from a 89/90 Bronco II or Ranger since they have pencil sized holes that wont allow leaves to build up inside the cowl.

I had considered trying that. My jeep wrangler has a nice set up like that but I'll probably just leave mine the way it is. I'm pretty sure mine will be in the garage if it isn't being driven or at a show.