AFAIK all raisin bran hood '70 Challengers had the DODGE letters, though I wouldn't be surprised if one of the historians here chimes in that some small number of them might not have had them originally. But most if not all '70s with the twin scoop hood had the letters. I'll be interested to learn if there were any exceptions?
In '71 they don't have the DODGE letters on those hoods.