Ray,
As Anthony said, you should be able to drive the pin out with a gentle tap... If your car has the factory hinges. I have a rack mounted to my hinges ( BJ8 ). Here is a tip.... Go to you local ACE hardware store and buy two stainless steel bolts that are a little longer than came with the the luggage rack. Then you will be able to put on a couple of nylon washers and a stainless steel self locking " acorn " nut to finish it off and keep the nut from loosening up when you open and close the trunk ( boot ).
Ed