I believe the first photo with two emblems is correct for 340 Swingers, and all the other non-340 cars got the single Dodge cursive script. This is from wandering junkyards and seeing photos of low mile originals.

Block style lettering is for 71. I had an original butterscotch 71 car and those have the block 'Dodge' letters on both the hood and trunklid. Both off to one side of the car.