1973 Duster

Got a 1973 Duster from a friend. I'm 20 and kind of know kind of don't know what I'm doing. I want to swap the 73 front with a 70 duster front so grill, hood, bumper. I know I need different supports just don't know which ones are the right ones to use. Anyone know and trying to help?
62353560029__31CA0D0D-A23B-4B90-A4CF-1BD55FDFEC7D.JPG 62431250688__608C91CB-2F72-4701-96A1-ECCA1D8B596D.JPG