Interesting way to mount the CB.
Not sure it will work, even with a Uniden 520, which is small and not too high and a great radio, would have a problem fitting and I do not believe there are many others.
Maybe make a new OHC, sized for the new CB but not too big.
I like my OHC but I am thinking on something new to house the front panel of my HAM VHF Radio and some switches. Some OHC have drop down compartments for radios or other equipment.
There are a lot of threads of this subject, just search and read through them, there a lot of idea and great installs.
4x4, 5sp, Std Cab, Stepside, E4 Red
4” Lift - Coil-Overs, 6” SkyJacker Leafs - No Blocks (Mistake)
31 Spline FX4 Rear Axle, 4.56s and OX Locker, Hurst Shifter w/Optional Stick and "Made by Grev" alignment adapter