I received the new unit today and installed it.
Here's what is in the box.
I had to drill 3 holes for new screw locations.
The adapaters made this very simple. The hardest part was just figuring out where to mount it. My old unit was mounted horizontally on the forward side of the subpanel. The new unit fits vertically near the same location. The antenna coax uses a BNC to TNC adapter, and the connector adapter cable supplied hooked up with no problems.
I did a quick radio check then went flying and had no issues!