Are you serious! His remarks were sarcastic. Black and gray you can see the difference with your eyes. I should cut sections out of my grilles for him to check chemically. Are you kidding me where do you people come from. We're chemically testing grilles now? I'm telling you. All the molded gray grilles I had and have are cracked I took pictures of them today and posted some. And the molded black grilles are not cracked which I also took pictures of today. All the molded black grilles were painted silver Thats fact. What I was just told was 71 340's with the V24 option. came with silver grilles. That could be possible. I never saw a silver grille in a twister or a 72. They were always blacked out.