69 barracuda question on paint scheme

That's a good question.
I'm not sure what ma mopar did but believe it was body color. On my 67 cuda I painted mine black so the grill would show more than having the body color showing behind the grill. My car is sublime green which is a bright color and more than likely it would be seen very easily through the grill. I didn't want that. If ones car is going to be a dark color then it wouldn't show as much. So I guess another words its really up to you. If it is going to be a concours matching car then you might need to do some research.