Actually, they found out later the scoops were, at times, drawing air out instead of in. That's why the 69 and later RA hoods have the scoop at the front.
Ummmm ... no.
The scoops are in the boundary layer (even on '69 cars - including the Trans Am) and don't actually "ram" air into the engine. At best, they allow COLD air into the engine.
If the engine is running, there's a negative pressure gradient at the mouth of the scoop that would absolutely prevent the air from being "sucked out" at ANY speed below supersonic.
Not until 1970 were the scoops moved out of the boundary layer on the 2nd get Firebird. The GTO had "forward" scoops which were still in the boundary layer until the NACA ducts of the 1973 and the shaker used in 1974.
The orignal '70 T/A shaker was intended to be mounted on a dual quad intake with the opening facing forward.
