Given the information you have provided so far, the model year of the Dart you are
describing has been narrowed down to:
1971
1971 Highlights:
Four tail lights (instead of two) mounted in the rear bumper
Features unique to the 1971 Dart (as compared to all other 1967-1972 style Darts):
None
Identification Process:
The protruding front grill and sloping rear end with tail
lights mounted in the bumper narrows it down to 1970-1972
Having four tail lights mounted in the bumper narrows it down to
1971-1972
Having turn signals which do not have a raised ridge or bezel
around them narrows it down to a 1971
The only major styling difference from 1970 to 1971 is at the back of
the car; the front end stayed the same.
The 1970 Dart had two large rectangular tail lights mounted in the bumper.
The 1971 tail lights are still rectangular, but they are smaller and
there are now four of them instead of two. The reverse
lamps are located in the centers of the innermost set of tail lights.
The 1970 and 1971 Darts are
the only ones (from 1967 to 1972) that you need to get behind
to positively identify. All of the other years have something unique
about their front end which allows you to tell what year it is from
the front alone. You can narrow it down to 1970 or 1971 from the
front, but to take it any further you'll need to walk around behind
the car and look at the bumper.
