71 for sure because the passenger inner fender changed in mid-71 to add a charcoal can and make it so it wouldn't get in the way of the alt. (on /6)
this one has the later style inner fender, with the holes drilled implying something was there I would say this is a late 71. For sure not a 70, 70 has the older style inner fender which is smooth over by the alt.
