No problem. I don't know for sure if there is a foam plug on the driver's side, but even if there isn't, you can always run the coax along the firewall to the passenger side.
If you do a search in this section, there are several threads on mounting a CB. Some, if I remember right, even have some basic instructions on making your own overhead mount.
Another good resource, if you are new to CBs is CB Radios & CB Antennas - Cobra, Uniden, Wilson, K40 & Firestik
here. They have resource pages that you can access.