I have done it on quite a few xj doors. The way that I have done it is by leaving the pin intact and cutting the bottom of the hinge. Then, I cut about a quarter inch off of the lower hinge pin and grind a slight taper on the bottom of both hinge pins. This makes it easier to put the door back on because you get the top pin started in and can then line
up the bottom easily. On the driver's side, the pins are pressed in from the top, whereas on the passenger door, they are usually pressed in from the bottom. This is easily overcome by tack welding the pin at the top after you cut the hinge. If you have power windows and locks, there is a connector behind the kick panel that will allow you to disconnect. You can remove the pin from the door stay and drop a bolt through to keep o
it intact.