Well, it's a safe bet it's not a ball mount in the center of the roof so as long as the hole is a standard 3/4" changing the entire mount if need be won't be a problem. CB being near the top end of HF mounting isn't critical for technical reasons beyond the scope of this discussion. Taking a look at the truck being such a mean machine makes me wonder about antenna placement that won't uglify it too much. I was thinking if you don't constantly drop the tail gate a 102" fiberglass whip on a modified trailer hitch (remove the ball and put the mount through the hole) won't look bad and since it need not be high on the vehicle you'll still "get out" pretty well.
Just to get slightly technical, since an antenna radiates over its entire length when mounted low little or any of a loaded antenna extends over an obstruction, that's why I mentioned a full quarter wave. Don't worry about metal de-tuning it (those pesky swors) since the hitch sets it back from the gate rather nicely. Take it from an ex CBer, I was never fooled by the flub and fluff, I know my stuff (and can rhyme too).
