Bob gaines is serious with his answer as that is why the rubber boot is on converts. After having 2 verts with the boot on dimmer switch i looked up ford part # & says 76 convertibles use so i looked at switch location on floorboard & the inner convertible rail blocked your shoe from reaching over by kickpanel to find dimmer switch. It is harder to reach switch on 4-speeds because of clutch pedal in the way verses auto.