What exactly are you trying to do. Your being very vague. The hinge brackets are welded in place yes. Why are you wanting to remove them? Have a pin wear through the bushing on ya and egg the hole?Are those door hinges on the drivers side with the pins/bushings welded on or bolted in ? if they are welded on would you need to re-weld them back in or re-bolt them back on the actual body ?
Well exact placement is going to be a bitch. There has to be an engineering drawing out there with exact position. But if it were me i would use a straight edge and mark w/ sharpie parallel lines extending from the hinge in both up and down directions and foreward and aft. That way once you remove the bracket and clean up the area, you can put your straight edge back up there and re-draw the exact placement. tac weld it on then temp install the door pins and check for alignment. Thats going to be a pain in the ass, good luck man.I want to remove the hinges and weld new ones back in, because there is a crack on the interior. I will post pictures up tonight of the damage.