'73 Duster underhood wiring harness

Looking for a underhood wiring harness for a '73 Duster. The car was a six cylinder but it's getting an 8. It will also have fender mounted turn signals.I have nothing right now so I'll take anyone you have and I can modify it to what I need.Pm me if you have one and how much. Thank you. Also looking for the filler between the front grille and bumper.