Can the front end of a 73 Dart Swinger two door be changed to a 70-72 front end? If so what would be needed?

Thanks.

Let me re-phrase that question. Can the front end as in hood, fenders, bumper, lights be changed?

Yes. If you have the entire clip from a '70-72 car it's a bolt on. Hood, fenders, hood latch support, grille, bumper, and valance. If you buy pieces one at a time there will be some fabrication needed to line up different brackets. You can change the doors if you want the vent windows.

Thanks a bunch.

Here's my '73 Dart on the right, next to a stock '73 Dart which didn't get the much desired face-lift

That looks good, I don't like the front end of the 73 and up cars.

How much difference is there in the rear tail panel area?

Different rear bumper on a 70 vs. 71-73.