I think NoMad has the ideal rear deck scoop for a Fiero. I'm sure there's some benefit to the scoop, but just how much, I don't know.
I have done an airflow test on the decklid and wing to see if what some said is true. It is true that there's a great backwash of air from the wing toward the rear window. So, does that change with the installation of the decklid scoop?
For the Kermit hood scoop, would it be possible to move it further forward to avoid cutting the front bulkhead?