There's no difference in the dash frame. Non rallye to rallye dash conversion is a direct bolt in except for the wiring. The light bar is different. A standard dash has 3 bulbs, and a rallye dash has 4 bulbs. Be sure to put ALL of the screws in the switch panel. One of them provides the ground for the switch panel to the dash frame, and if you leave that particular screw out it will drive you nuts trying to figure out why the lights and wipers won't work right!