I run a icom ic-2780a.
The way I did it is pretty unconventional to what most guys did but it opens up a lot more possibilities to add more accessories in the future.
I built a custom mount with scrap wood that goes under the driver side rear seat, ran 8 gauge power and ground to the engine bay and also fed the antenna cable along (I also fed my switch-pros 9100 controller cable through as well).
I connected the power to the battery via a circuit breaker, and ground to body inside engine bay and connected the 8 gauge to a BLUE SEA FUSE BLOCK WITH GROUND. This will serve as the center for my interior power distribution block. Then I mounted the ham right next to it, ran the 3.5mm speaker extension wire to front passenger side where I mounted my speaker, and utilized TWO CAT6 extensions for both the display and the mic.
I ran both display and mic extension under the center console. The mic comes out of driver side footwell and the display comes out from top of the dashboard.
To do that, radio removal is required. I took this opportunity to also install ICS Dash Mount to hold the display
I also drilled the bezel next to the ciggy plug to feed the Cat6 cable through.
To mount the antenna, since I'm running A-pillar lights, I utilized SDHQ A-Pillar light mounts with Rago Fabrication HAM Radio Antenna Mount extension. SDHQ plus Rago combo has been a tried and true solution for a-pillar setup, and have proven to work extremely well. I ran the same combo on my previous rig.
Reason to mount at A-pillar are:
1. I can see the antenna. I've seen antennas incorrectly or improperly installed flew off on the trail when doing high speed trail runs. This is due to vibrations and lack of threadlocker. Though, I have to say, on my previous rig I did not use any thread locker and I had no problem with the antenna coming loose.
2. Bed side is reserved for other things, like the camper.
3. Not messing with 3rd brake light especially when we already have leaky third brake light issue.
This is probably overkill for most guys, but I do also run a DC-DC charger and an EcoFlow system that gives me 3000Wh of power capacity inside the cab for fridge and to power my StarLink and charge my drones, so I did this from the get-go and serve as the foundation for my interior build. All these were done with only 300 miles on the clock and I'm at 21k right now, with plenty of trail mileages. So far so good.
Parts used in addition to iCom HAM:
Speaker:
Amazon.com
(I chose one with the mount like that for ease of installation)
3.5mm Extension:
Amazon.com
Cat6 Extension:
https://a.co/d/5VP8MWI
Cat6 Extension:
Amazon.com
Tram Antenna:
Amazon.com
Tram Antenna Cable:
Amazon.com
Rago Fab Ham Antenna Extension:
Ham Antenna Ditch Bracket Extension
SDHQ A-Pillar Mount:
'19-23 Ram 1500 SDHQ Built A-Pillar Light Mounts