'74 to '73 Dart rear bumper interchange

Can I swap '73 Swinger rear bumper onto '74 Swinger with no issues ? Are deck lids the same ? Thanks.
The rear bumper?

No, not without extensive modifications. Click my build thread link in my signature below. I just finished this swap. You'll need the following off a 73; tail pan, rear valence, rear bumper, rear bumper brackets, rear taillights, rear taillight housings, 73 quarter panel extensions. plus the taillight harness for the 73. Basically, the entire rear clip of a 73 donor car.

As for the deck lids, yes they are the same.

Project 440DD