I just replaced the lower pin and bushings on my driver's side door. ( 88 RC) .Before I loosened the door, I placed a jack stand & board under the open door to hold it up, Used a welding glove to keep the board from scratching the door. If you use this method, make sure the door isn't resting on the door skin. You should still have someone there to hold the door. Next step was to drive out the lower pin using a length of rod with the end drilled out a bit ( just enough to keep the rod from slipping of the pin while hammering). You could use a long 1/4 inch extension, but you run the risk of damaging the extension if the pin is stubborn. I then removed the three bolts that hold the lower hinge to the door and then loosed the bolts holding the upper hinge to the door. Once the upper hinge is loose, then you can ( with a bit of wiggling ) slide the outer half of the hinge out. Once it is out, you can install the bushings. Slide the outer half of the hinge back in and drive in the new pin. Start the 3 bolts that hold the lower hinge on to the door .You shouldn't have too much difficulty getting the upper hinge bolts snugged down with the hinge in exactly the same position. There will be marks in the paint that show where the hinge and bolt heads were located. Now go back and tighten the three bolts on the lower hinge. You might have to loosen the bolts and move the door a bit if you're not lucky the first time. I didn't have to do the upper hinge pin, but I'm sure that you could handle it the same way.... or you may find that it is only the lower bushings that are gone. Feels like a different truck now that the door doesn't clunk and sag when I open the door. Good luck.