Dart Sport bumper on Swinger?

I don't think it's a direct bolt on, personally I like the 74-76 rear but the location of the bumper is lower. I imagine you would need to find out where you'd put your tail lights too.
I'm really tempted to weld the rear end of a 68 dart into my 70...I have the parts but that's how ugly the rear view is to me just a dumb design in my opinion