The guy working at comtek is great! He will set you up with what you need! Just make sure you buy enough of the cable to reach all the way to the back!
18' is the recommended cable length for a CB install. I have an SWR meter but will be at a wedding on the Saturday, working till 6 on the sunday. If you want a hand however, Im fine to help you out sunday evening... If you get the radio installed Ok I can help ya tune it with the SWR meter. Otherwise, Steve (Knox) also has one of my meters, and Im sure if Im not around he can lend ya that one
Its pretty straight forward. Google CB tuning and you will find a wealth of information!
GROUND YOUR ANTENNA PROPERLY!!!! That is going to be what makes or breaks your install. The mount he will sell you at Comtek will have a plastic washer that needs to go on the correct side of the mount. Pay attention to this and you will be fine