Interesting. I only have a few saved photos of this style. I was trying to work out if they'd extended the opening cut to cover the rivet holes but it seems nicely pressed with lip still.
I checked, it was 1981 for new opening and rivets through the top, so yours must be a 1980 dash top.
1981 Turbo TA Pace car exposed dash VIN rivets original by
Aus78Formula, on Flickr
Here's the underside of my 78 with dash removed, a view you'll rarely see or find in a search. The black bracket supports the VIN plate. These are the rivets I asked about earlier as to what style the originals use here, mine has been apart.
Firebird dash metal VIN plate rust repair by
Aus78Formula, on Flickr