This guy installed a VHF radio in a Lightning. He used a very cool mount that replaces the high mount brake light. Just make sure you’re sitting down when you go to check the price.
I have found that the Comet FO4ANTNCGR mount works very well. I especially like the fact that it makes use of a factory bolt for attachment. Be sure to get the one ending in "R" for the passenger side. The modifiers guide advises against installing two way radio antennas on the drivers side. I believe this is due to the proximity to the charging port.