They really aren't "rare" they made a zillion of them and most I think were five windows. That don't mean it isn't neat, and can bring good money finished nice. But as a field car, it shouldn't bring too much money. As for chopping it, I hadn't done one before when I chopped mine at 16 years old and it came out ok.
Click on the video to see me at 18 right before I painted it.