Used the old 4x8 speaker to make an adapter to mount a new Pioneer 4x6 2-way speaker on. Once in the dash, it's barely noticeable except at certain angles in certain light. Even with just that speaker going, the newly converted radio sounds great! And it works beautifully too! Everything works as it did but now it also gets FM stereo and accepts an iPod or XM auxiliary. The Wonderbar works on both AM and FM and turning on the XM tuner switches over to Aux automatically. The rear speaker is a standard 6x9, so a replacement Jensen 3-way speaker went right in without any fuss. The ash trays needed some help. They kept flopping open and it turns out there is an "S" spring that goes in there but the ears that they hold onto were broken off... I riveted a new piece of metal and improvised a screw to hold the end of the spring.