Thanks guys!!! You guys know your stuff!
It makes a lot of sense. They came from a Pontiac guy, should have guessed that much. If they were a first design, and from Dave's catalog being possibly a second design, It looks like the original owner had clearance them a tiny bit for maybe a bumper interference issue? It looks like the ones in the catalog are a little bit further away on the mounting tab.
So they are legit NMW's? Much call for the Firebird ones?
Scott