On my Toyota pickup, I mounted the remote control head for my Kenwood V7A onto the sun visor. Fold it down to look at the display, and you don't really have to take your eyes off the road. Fold it up to return to normal driving mode. I've found that the buttons can be worked just by feel (you end up knowing where everything is in short order, and you won't even need to look at the display much). Tuning can be done from the mike controls or by folding it down and using the tuning knob.
Since the control head can be disconnected, I don't have to leave it in the truck to melt on a hot day. Even if the control head is in place, if the visor is folder up nobody can see it from outside.
Ran the wire for it over to the top of the corner molding and down behind it to get to the bottom of the dashboard. (The piece can be pried off easily to run the wire.)
The radio itself sits under the drivers' seat. So the wire from the control head weaves under the dash, then down at the transmission hump, under the carpeting to the radio. Ran the power cables as directly as possible back to the dash area, through one of the access ports in the firewall, and straight to the battery - fuse on each wire there, of course.
The antenna was a permanent roofmount. Had to have a local place punch out the hole for it and install the connector, then ran that above the ceiling lining to the front right corner, down and under carpet back to radio.
Speaker and mike the same as the power: wires go back from the radio, under the carpet to the dash, where I mounted a speaker and the mike holder.
Works like a champ and I'm very pleased with the result.
MAIN THING TO DO: PLAN, PLAN, PLAN. 50 hours or more may be spent just planning where everything is to go before you even start the hardware job. You want this to be right. You won't regret it, and it will result in a great installation that will be a pleasure to use.