A SO-239 mount was installed for the Yaesu ATAS-1ØØ antenna.
The separate power switch allows me to apply power to the radio when the key is off. Normal operation is power off with the ignition key. I use a separate horn relay to apply main power to the radio.
I do think the speaker is a bit hard to hear with the widows rolled down. I may change to a power speaker.
The control head mounting plate was mounted on two L-brackets, which were screwed under the head liner to the metal roof liner. With no brackets visible, it made for a nice looking installation.
The radio panel is easy to see, and operate in this position above the mirror. It allows me to not take my eyes off the road when spot checking, or changing the settings.
It is also away from heat, sunlight and dust, not to mention those nasty coffee spills.