69 Barracuda grille work

Hey guys,

I been working at some smaller projects on my car. I really like the looks of the Formula S black grilles. I had a set about 4 years ago that my wife coerced me to sell, since I did not have a Barracuda at that time. So I figured I would give my grilles the once over. I have done the drivers side and now working at the passenger side.
Now the question is: Should I spray the core support a black or the cars exterior color? What do you all think?

Dan's grille..jpg

My friend Dan's grill. i'm doing mine this way. Dan did a beautiful job. Showing as an example to think about.