I have a new Freightliner Cascadia(company bought it),will the factory am/fm stereo still work well if I replace the factory fiberglass antennas with Wilson FGT-4's and tune them correctly. The reason I ask is that the new Freightshakers have a multi-plexing wire harness and the cb and am/fm use the same antennas. Any advice is greatly appreciated. I'm usind a T&P'd Cobra 29 Black Chrome for a radio and will be putting a Palomar 275 behind it with a var. mod and receive kit in radio soon.