Wallace, with your car (coupe) there is less work than with a sedan which has the fabric wrapped channel all around the entire window. With a sedan the molding is secured at the end of the metal window channel down in the door. Alter removing the door panels, the molding has to be unfastened and removed. There are metal retaining clips every six or seven inches which hold the molding in place. They may or may or may not stay in place during removal. Sometimes they become damaged and need replaced. Also with a sedan, the window corners must be marked and cut so the corners can be bent but not cut entirely through. The channel molding on sedans is one entire piece all around the door (probably about six or seven feet ea.) with only a cut to allow bending the corners. Once the clips are in place and the corners are formed the molding is worked into place by fitting while moving the windows to different positions. Most likely the moldings were installed with the windows not installed at the factory. Care must be taken not to distort the channel molding during installation or it will bind the glass.