I finally got around to mounting my 19DX IV up front and my 102" in the back. I went with a 12" mount bolted to the rear bumper and cut a slot in the rear bumper fascia for it to slide through. The whip has a nice standoff distance from the back of the ZJ so it doesn't hit no matter how hard it swings.
Eventually I'm going to pull the VIC display from the center console (AWD doesn't need it lol) and mount the CB in it's place. Mounting it here I can also hold a drink between the CB and the seat like it's an extra cup holder.
The 4 holes next to it are from the PO. I routed the wire that way so I would still have easy access to the fuse holder. The cable and wire run into a hole in the carpet next to the seat(left by PO) and into the wire channels to run to the battery and the mount respectively.
I checked out a lot of mounts and locations and decided to go with this. The standoff distance between the whip and the ZJ protect the paint (no tennis ball needed) and also allows me to open my lift gate without the whip being in the way. I've pulled the tip of the whip back and down well below the roof-line and released it and it made no contact with the Jeep.