Differences between 70/71 and 72 Darts

Thanks for all the info! I recently picked up a 72 Swinger with the typical New England rust. That's when I started looking into parts and finding things different between 70/71 and 72.

First off, I'm sorry as I should've given some info on what I know for differences. I know the gauge cluster changed in 72, I know the 70 has the single taillights per side and the 71/72 had the duals per side, different grill with different turn signal lights and I saw that the 70/71s had the different side markers on the rear quarters than the 72. Other than that, though, no clue. I mean, I know some little things would've changed, but what's the differences in the fenders? Just the fender extensions? And are the doors the same for the three years?

I'll post pics when I get it home. Thanks again!