I looked at quite a few E-body engine bays before posting this and almost all of them had the rad support the same color as the car.
If you do a search you'll find it's incorrect. But, if you're happy with it, by all means keep it that way.
Just IMO it takes
all the attention away from the 70's catch point - the grille!! Though some people may want to see the radiator support and behind grille pieces, I'm not sure.
Just an idea as I made sure I done it and was told to along with other parts of my car. Without this site my car would have lots of pieces incorrect etc. A lot of guys on this board are quick to brown nose but won't put there hand up for constructive criticism. At the end of the day it will make your ride look twice as good with minimal effort. If it were my car I'd want someone to tell me.....
It's like having a boogey hanging out your nose but no one will tell you - I will.
Photos below, showing the grille difference.
First is non-black rad support
second is blacked out rad support.
The last photo is showing the factory diagram for painting the area.