I have one of these;
Which has been opened up so can TX pretty much anywhere
I also have the mobile mounting bracket and it
may just about fit into a 'Fender....
The problem you have with CB - both AM & FM -is that the band - 27Mhz is just about within the HF section of the spectrum. This is why all aerials are sooooo long and prone to snapping off when clobbered with a tree / hedge etc.
To use SSB, it's more than just switching to another channel, which is why stations can sound off frequency even if your both on the same channel.
I'm sure a senior ham-ist will correct me if I'm wrong, it's been a while since I played with my rigs or did my exam!
There will be a restriction on power, whatever mode you use, but people who don't know about how to get the best from their permitted power allowance will simply sling a sodding great amp on the rear end and blat through everything in sight.
Ofcom are powerless to do anything, so whilst a few will enjoy playing, it won't last long.