Here's a tour of the cockpit of my F250.
The video system consists of three cameras: front, cockpit, and rear. The cameras connect to the ST 400s video processor, which then outputs to both the video screen and the Chasecam PDR-100 video recorder.
The remote control for the ST 400s allows switching between any one of 4 cameras, or displaying single or dual PiP (Picture in Picture). Shown on the screen is the cockpit camera PiP on the front camera. Whatever is on the screen is what is recorded. The PDR-100 records onto compact flash cards (2 4GB and 1 8GB).
For the screen, I bought a video screen that was meant to mount on the roof and fold down, and pulled the screen out of it. I then made an aluminum bracket that attaches to the dash with 2" industrial strength velcro. I may permanently attach it with screws at some point.
The PDR-100 and the ST 400S both attach to the CB with velcro; there's a screen on top of the PDR-100 used to set/change various settings.
The microphone is a RadioShack 33-3013 tie clip mic mounted flush in the top of the dash in a 5/16" hole where I used to have a camera mount. It connects directly into the PDR-100.
The wiring for everything above the windshield runs up the driver's side A-pillar and through the headliner to the RD's, gauges, camera, etc.
Next on the project list is a wired remote control switch to turn the PDR-100 on/off and start/stop recording, and get another 15' or so of small diameter coax cable for the rear camera.