Install the CM3016 antenna above the roof aimed at 187 degree magnetic compass , 178 degree true. Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html. Here are some antenna mounts ,
http://www.ronard.com/909911.html ,
http://www.ronard.com/34424560.html ,
http://www.ronard.com/ychim.html ,
http://www.ronard.com, Buy the antenna mounts from ,
http://www.solidsignal.com , by the ronard antenna mounts by typing the word - ronard - in the solidsignal search box or buy from ronard.