If I had to guess I'd say those are replacement hinges, they appear to be painted black rather than body color. Both sets of rear hinges on mine are getting stiff and worn out, I have to lift the larger rear door to get it to close without slamming, and the hinges on the smaller rear door are so stiff the lower one broke a couple of spot welds in the door.I did take a look at the hinges and they honestly look fine to me. There's no sign of them dragging on the bottoms of the doors or anything like that. Again, it's an old truck and things age and sag but I think they're OK for now. View attachment 2996239View attachment 2996240