My doors are out of alignment bad. I thought they just needed to be adjusted but when I looked at it I realized that that "pins" holding the door to the hinge is worn out and wobbles. Can these be replaced or does the door hinge need replaced?

 

If the door hinges aren't welded to the doors or frame they can be replaced.
I don't know whether the hinges can be replaced on your car because no one knows what year the car was built.

 

It's a 93 GT. It looks like the hinges are welded on but can the pins be replaced?

 

yes, they can be replaced. you have to purchase the pins (2 for each door) and the bushings (4 each door). All you will need to do is get a floor jack or something of equal height to hold the door up to where it needs to be, grind off the top of the pin and punch it out of the hole (note: ONLY DO 1 Hinge at a time, dont grind them both off at the same time). After you punch the pin out, replace the bushing and pop another pin in there. Then repeat with the other hinge. When done, you can push down or up on the door (not hard) to adjust the door where it needs to be to close properly.