For anyone installing a CB in their rig, this is the route we took.
Picked up a 4 ft No-Ground Plane (NGP) kit from Firestik and installed the antenna just behind the LH bunkbed storage panel. Bolted the bracket through the exterior wall. Routed the coax down the LH pillar trim to the radio. I installed buytl tape behind the bracket as well as caulked some dicor around it/over bolts just for safe measures. Over kill, but I'll be able to sleep. lol. I was able to get the SWR for channel 1 and 40 down to 2.0 and channel 19 is at 1.5. Wish it was better, but this'll do for now with minimal effort.