RHuddle56,
I have used two kind of hinge rebuild "kits". Both were fairly straight forward operations.
1. Use an oversize hinge pin and drill out the hole (NAPA had these).
2. Drill out the hinge pin hole at the top and bottom for brass bushings. I think original diameter hinges are still used in these kits (Chevy Duty had these).
Here is an article on rebuilding hinges:
http://www.classictruckshop.com/door_hinge.asp I used a cheap drill press and had to ask a friend to press out the old pins (I do not have a hydraulic press).
Be sure to use new "hold open" springs.
Here is a write-up on replacing springs:
http://www.chevytrucks.org/tech/doorsprg.htm Made it much easier to align the doors and latches.
Tim
