1970-71 dodge dart differences.

So I am going to try and recreate my favorite high school car(1970 dart 340 four speed) and since I'd never sell it and clones don't bother me, I was thinking of maybe doing a clone. I have noticed that 71 darts seem to be a little more common than 70s in my area, so I was wondering what the differences are between a 70 and 71 dart swinger? Obviously the rear bumper and emblem location, but if any of you guys have any info on this let me know what else is different. Thanks guys!:burnout: