Hi there Zack, and welcome to Ausjeepoffroad.
There's not a lot of space to put a full size UHF in the KJ, so you're probably best of with either a hand held, or one of the remote head units from either Uniden or GME. They're a bit more expensive, but work really well. Here's a post of my GMEtx3400 installation:
http://www.ausjeepoffroad.com/forum/...pic.php?t=8229
There's also quite a bit of space above the panel that sits just below the steering wheel. Give it a solid tug from the top downwards, and it hinges down quite easily.