I'm not sure if this is the Volo Museum. The ad states the car is located in Southern Wisconsin, and the Volo Museum is in Illinois.
I like the flat black scoops too, but as others stated, that seems to be the first thing people feel they need to point out that is "wrong" on your car. Back when these cars were new, many people had a dealership or a local painter black out a tail panel or black out the hood scoops. This trend was very popular, and manufacturers began offering blacked out trim from the factory. The Mach 1 rear window louvers, blacked out hood on a 70 AMX, blacked out hood on a Super Bee, or the AAR Cuda, or the blacked out tail panel on the Camaro SS, etc.
I like the blacked out scoops because it sets off the "400" die cast emblems on the Firebird hood, but many purists I know cringe when they see this.
Heck, it's your car, do what ya like.
I duplicated the hood stripes that were used on the 1969 Firebird 455 Engineering Car.