To begin, carefully remove the A-pillar molding. If using the gauge pod, you'll need to drill four 3/16-inch holes to mount the mod to the stock pillar, and one large hole to run the plastic airline. Auto Meter's gauge pillar replaces the old unit and you only need to transfer the holes for the mounting screws. The dash bezels of both cars will need to be removed in order to access the lighting switches. Mount the gauges in the pillar and run the wires to the bottom.