Custom Bumper with exhaust cutouts

I've been thinking about this since first seeing the bumpers on the new Rams. Thinking I'd like to do this on my '69 Dart but with the original factory rectangular tip design rather than round. Unfortunately, I don't have the metalworking skills to do this - just the ideas.
I'm going to have to get busy and crawl under the Dart to see if there's even room to do this.