If you can swing your radio with swing kit, that'd be awesome. Any amount of wattage outside of what is stock will throw your range like no other; dodge the echo mics too...just saying.
I use a Laird Technologies model C 27...it is specifically made for 27-31 Mhz transmissions within the business sector, ie quarries and road crews.
I had it tuned to 27.185, or somewhere in there, and it sings and receives wonderfully.
I have a lip mount on the driver side by the hood. Its a great location, and works out well there.
The only problem I have is when I'm bushwhacking and in low clearance, the damn thing comes whipping down into the cab. I've gotten some good marks on my arm from it and on the inside of the door. It has never hit a closed window.
If you need pictures or more information, let me know. I live for this kind of stuff outside of wheeling in the trailblazer, of course.