Do them all! Its easy and cheap. Once you get the door removed (mark with a pencil around the hinge on the doorshell) from the hinge begin by knocking the original pin out from the bottom upwards. You may need to find the correct drill bit for the size of the new brass bushings outer diameter. Drill the part of the hinge left on the pillar. Knock the new bushings into the top and bottom of this part of the hinge. Take the top part of the hinge that bolts to the doorshell and give it a little squeeze in the vise and test fit onto the part of the hinge left on the pillar. You want a tight squeeze here. Once you get the hinge tight drive the new pin in from the top. All the hinges are done the same way. Install the door and your done. You may or may not need to readjust the hinge where it bolts to the pillar! If so the top hinge is a little tricky with the dash still in the car but can be done with patience.