I was going to do this with the factory radio in the crapmobile (the van I drove to Ohio last year) and ended up deciding it wasn't worth it (it had a broken cassette deck in it) despite the better reception the factory radio got, because I simply don't do enough FM DXing to worry about it anymore. All of the radio stations I used to listen to were outlying Pittsburgh (Beaver Falls, Greensburg, East Liverpool, Blairsville, Indiana, Northern Cambria) and without exception they've all become useless, the last, probably 10 miles out of range of my house, about a year ago.