I need to mount antennas on an international truck.
It currently has them behind the cab.
I'm thinking about mounting a pair of 102s on the rear cab extensions
or
Mount a pair of short antennas on the grill guard at the front corners.
or
Mount all four, cophasing the rears and then the front, and then cophasing those together.
I can't drill any new holes or damage anything.
Which choice is best?