I have carefully reviewed all of the above ideas and suggestions. Dean's radio is the same exact as ours, and the installation (except for the antenna) is quite innovative, and professional. The antenna is however, as I see it, out of line (from a side view, several inches ahead of) the radio antenna and that sort of looks aesymmetrical. So what I decided to do is put together a portable temporary fix (cigarette lighter power, and magnetic antenna to put on top of the rig for us to use for emergencies and weather updates. If we can figure out the antenna symmetry, I will probably install permanently using Dean's fine pictures and ideas.
Thanks to all for your great advice.