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?
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Wow, she was running on chocolate milk I see