http://members.tripod.com/~cb_antennas/index.shtml

www.firestik.com

Start at the Firestik site. Read the tech and faq sections. Look at the stake
pocket mount or hood mount. Firestik and Wilson are both high quality and top
performers. 2 - 4 foot tall is best for your needs. The box or the cab are
enough "ground plane" for what you are doing. I have a 3 foot Firestik on the
rear corner of my CJ7, works great.