Are there two types of rubber/plastic covers for the ignition switch? My 73 has the "master" switch and the new cover I bought will not go on all the way. Seems like it should be longer. The wires are nicely compacted and I even put some shrink wrap on to keep it clean but the cover just won't play nice. Only one # in my parts books. What's the deal? If there is another type of cover does anyone know where I can get one? Thanks for the help with my daily questions. Glenn.