There is a stamped sheetmetal pillar that has to be removed after the window plug is removed, the top of the door jambs have to be cut out, and the rubber gaskets have to be installed. The rain gutter has to be extended as well. I put the whole roof skin and rain gutters on from the other car. The window regulators are bolt in as are the tracks. I used the weather strips and channels from the other car,and the felt and moldings too.