I have owned a 70 and a 71 dart and know that the silver grill paint is identical on the two cars. It's a light metallic silver. It feels smooth to the touch and not gritty.

They sold me a can of the grill silver #865 for my 70 dart. It's not a 100% perfect match, but close enough.

I think AdamR said he uses the rallye wheel silver on his a-body grills.....Maybe the rallye wheel silver and the grill silver are the same thing or super close.