7180 Install and Antenna help

Looking to install a 7180 in my 2013 GMC truck. Looking for help/pointers/proper way to install the radio. Hoping to put a remote head unit in as space is limited where I want to mount the radio. Where is a good spot to mount the radio itself, not the head display.



Also looking for suggestions on a fender mount antenna. I don't want to put any holes in the roof of my truck.