1973 Dart Sport bumpers

Not sure of that. i know the front is different from 73 to 74 - bolt holes do not line up. Not sure about the rear tho. Maybe someone more knowledgeable than me can answer.
Well I talked to my local parts guy, and he says no they are not the same.... I don't know how quickly you are wanting one, but I plan on removing mine and swapping to a 72 style this winter. I am diligently working on getting it running to enjoy the last cruise ins this year and don't want the rear bumper to hinder me lol. If you haven't found one by November and Greenville SC isn't too far for you, I'll sell you mine