Wow, let's see...off the top of my head...
 
1) Windshield became laid back further, narrower at the top, and moved the wiper motor to the inside.
2) different front parking lights and rear tailights.
3) steering column and wheel
4)seats, frame and cushions.
5)dash layout 
6) heater controls
7) windshield latches turned to knobs
8)roll bar
9)tailgate no longer drops down
10)floor pan shape, especially over the tranny.
11) Door mounting brackets changed.
12) frame became wider towards the back
13)fuel tank filler neck became narrower
14)shoulder belts added I think
15) cowl vent grille changed size
16) rear axle went to model 20
17)tranny options changed
18) tool box under passenger seat was eliminated.
19) Windshield hinges no longer slotted for quick removal (I think)
20) Leaf springs changed dimensions
 
Okay, I took care of the easy ones. 20 seemed like a nice round number.