Additional In my case my wife wanted nothing to do with Ham Radio (No comment) and I do not care to operate HF from the pilot's seat, just VHF/UHF FM. (And CB) so I mounted a 2x4, finished and beveled, to the side wall (I do not have a driver's door) and mounted the radios to that, looks rather good. BUT.. when the window drips due to condensation.... Bad things happened to one radio.
I now have a shield to keep the drips out of the radio. (Silicon sheet from the kitchen mounted behidn the radios, It only takes a few drips to ruin a radio)