70 Swinger 340 question

I own a 70 340 Duster on the deck lid and hood are Plymouth emblems with Valiant Duster 340 on the fenders. My friends got a 70 Swinger 340. Shouldn't it have Dodge emblem's on the hood and deck lid and Dart Swinger emblems on the quarter panels. His car has Dodge in the front middle of the hood lip but on the deck lid is another Dart and Swinger emblem. It doesn't look to be correct to me anyways. What would be correct for his car?