My skinny little Cobra CB has been in the pocket above the sun visor since 1994.
You need to loosen some of the mounting screws to get it past the lip, but if you get a small enough radio it will fit there securely.
KAA
Love to see some pictures of this, What model is the cobra? I have always thought this would be a great out of the way place for one but have never seen one small enough.
I love the Lev-o-gauge mount. The only thing more useless than a Lev-o-gauge is one mounted on a sloping surface.