The purists hate the gills on the 72-74 cars, but I think they break up the sides of the car. What I don't like is '71 gills with '70 hockey stick stripes.
Seems to be too much for some reason.
Note...I installed the gill panels in my wife's car which was a real pain. I've seen a car where the guy just cut the holes out and mounted the gills into the non-recessed holes. They stick out just a little but they look very good and you don't have the cost of the gill panels or the headache of trying to get the body work to look right around the gill panels. Welding in the gill panels tends to distort the fenders no matter how careful you are. I've done several sets and they all had to have a few hours of work to make them look right.
By just cutting out the holes, all you're out is the cost of the gills and the retainers and a couple of hours of your time.
There's a guy in Illinois, I think, that will punch your fenders for you but that too would be cost prohibitive with shipping both ways, etc. unless you lived nearby.