Have a 76 dart sedan possible to swap a parts on it?
That's exactly what mine is. A 76 Swinger that has 72 Fenders and bumper, and a 71 grill and 6 pack hood. The hardest part is the front bumper brackets. The 76 had the impact shocks behind the refrigerator bumper. The 72 bumper had a nice 4 x 12 flat bracket that almost lines up to the existing bolt thread taps. Drilled that out and welded in a sleeve to the frame for the 72 style bracket bolts. As far as the rear goes, you need to changed the rear quarter extentions and remove the lower trunk panel with whatever tool of destruction you choose. That will make way for the earlier bumper that has the lights built in. Haven't done that part yet but I had seen one on the Hoosier Tire site a while back that looked real good. They kept the 73+ front and changed only the rear to the 72 earlier look.