Hoods are the same '70-'72, tail lights are unique to '70 unless you swap for a later bumper. Most misc stuff fits '69-'75 unless it's specific body/interior trim and then it depends on the parts. Most things interchange even if they aren't correct for that year.
It depends a lot on your goals for the car, year correct is harder to do than simply functional where you can adapt anything you like as long as it fits.