'70 Swinger Grille paint scheme

Hello,all A-Body fans,I'm restoring a '70 Dart Swinger 340,and it seems that my car has a '71 grille (Blackened with silver)paint scheme,I am to beleive the '70 grille is all silver.Am I correct?also,my question is,could I leave it black and silver,and would it be correct for my year car,and if it is not,is the all silver paint scheme all the same color and texture or is it a two tone silver paint?.Any knowledge or ideas would be appreciated . Thanks R.W.