I just installed a President Bill C.B. In my pickup, it’s a very small package, it has a heat sink so the size really isn’t an issue, I’ve had really good luck with the Firestick brand antennas, they have an easy to tune top that just threads in or out to tune, Make sure to tune the antenna it really makes the difference on range, SWR meters are inexpensive and easy to use, I purchased everything online from C.B. World