easier to say that it cant be done. the only piece of the molding on an 87-93 GT that is seperate is the door piece, the front piece is molded as one piece with the fender extention, the pieces in front of and behind the door are molded into the side skirts and the part behind the rear tire is molded in with the rear fender extention. nothing about the 85-86 piece matches the 87-93 piece, even if you did cut it all apart and try to attach the "GT" piece. the shapes and contours are totally different.