Got a present for Gramma's car. NORWOOD, a member here and over at PY reproduces several Firebird-only parts. One of them is the set of correct steel grills for the 1970 to 1975 Ram Air hoods. Just got them today and installed them. I even had some of the correct shouldered hex screws in my box-o-bolts, for the installation
The grill actually slides into place from underneath into preexisting slots in the hood. Two screws are then fastened into two molded-in bosses. They hold the grills in place from the bottom.
A face only a Grandson could love. (The 74-75 cars seems to be the least adored noses of the entire 1970 to 1981 line)