My recently purchased '66 has had rather extensive 're-wiring' under the dash, including an aftermarket radio which has both front and rear outputs but only one set hooked up. I'd like to hook up the other set but I believe the wires are buried up under the indash speaker. I can't determine if the glove box comes out, whether the speaker comes out, or if I need to remove the dash.The car has A/C and removing the front panel from that gets me nowhere that I can see. I am considering removing t