bradbrownjr

If I can suggest something, contact a local shop that does conversions of police cars. They might be able to help you setup a external speaker that uses your factory sound system. The local pd here has a couple of the new cars setup this way. They hear the local dispatch on the left side and the county on the right side. I have a 05 with the shallow armrest that I really want to convert into my radio box. Your pictures have given me a couple ideas on how to do it now. 

I built the mount myself with 3/4" plywood and 1x2 pine.  The base drops into the center console, and I attach each radio at the base with some bolts and wingnuts.  Here's a pic before I painted it black
 

Yep - here's a better picture of the radios as I was programming the scanner:
 

 
That is one benefit of the center console armrest install - the radios are out of sight, and they don't attract any unwanted attention.  That's kind of the theme/look I'm going for with my install.  I'm not really trying to advertise the radios anywhere on the truck.  The all black antennas are barely noticeable at a distance, blending into the background or the black color of the truck itself, and no radios are visible from the outside looking in.

Being one of the last cool Saturdays left before summer hits here in Phoenix, I finally got around to drilling and mounting some antennas on the roof of my 2013 crew cab F-150 4x4, 3.5 EcoBoost.  The truck has a sun roof which significantly limits antenna placement. With the sun roof fully open, I was able to place both antennas 12" from the rear of the roof to clear everything. Not ideal, but it works MUCH better than the mag mount I had been using.  Stretches of highway on my commute that were completely deaf to our local repeater when using the mag mount antenna I can now hit easily.
 
Here's the final result:
 

 
I picked up a Laird X-ACT hole saw from a local radio shop and it worked great.
 

 
Holes marked and masked - measure twice, cut once!
 

 
I got a great tip from a fellow AGRC member which was to put down a protective layer above the headliner when it was dropped down in order to catch all the mess from drilling and sanding; I laid down an old towel on top of the headliner before I got started. I used gorilla tape to keep the coax from flopping around, and ran both cables behind the rear passenger side airbag (super important!), down the rear pillar and under the door trim up to the center console.
 

 
Antennas installed - in the photo is a Laird QWD144 1/4 wave 2m on the right and a Larid BB4502N 1/2 wave UHF for GMRS on the left:
 

 
I also have a Larsen 150/450/800 on the front fender for my scanner:
 

 
I currently have a Uniden BCD996P2 and a Motorla CDM1250 installed in the truck; an Kenwood 2M rig will be in there soon:
 

 
Action shot!
 

I'll be following this and similar conversations. I'm also in Maine, down in York County. Since the wind storm back in October, that knocked out the Internet and cellphones for a couple of days, I've been trying to talk my father and brother into getting into amateur radio so we can keep in touch during the next one. They don't have the time to study, and I found that GMRS was good for the family, so I've moved to pushing that agenda.
 
None of the repeaters on myGMRS for Southern Maine appear to be online these days. The channels are quiet and the fellow listed as owning the bulk of them hasn't responded to my inquiry. I do hear a morse code ID occasionally on 462.675, but I haven't caught it to record and translate it into a callsign I can lookup. I'd love to find out whose it is and ask to use it, as it seems to cover Sanford to Scarborough. In the meantime, I think I'm building my own.
 
I'm in Waterboro, Dad's in Limington and my brother in Poland. I think if I were to set up a repeater on a battery at the folks', we'd have the reach to cover the three houses and our commutes. I'm interested to see what you come up with, WRAV269. Good luck, and maybe we'll connect sometime when I'm in your neck of the woods again!

Your radio  - mxt105, isn't repeater capable.  You can monitor the frequency the repeater is broadcasting it's id on with Morse code; that's what your hearing but you can't talk or bring up the repeater because the radio you have doesn't transmit the alternate frequency required to key the repeater and make it rebroadcast  your  transmission on the same frequency you hear.  Two different frequencies 1. broadcast and 2. transmit.
There are lots of radios that are repeater capable.  If you're coming from cb radio you have been talking on what called simplex - one frequency (channel).  When you start getting into repeaters to extend your range you use two frequencies - transmit and receive.  
Be cautious how you spend your $ on radios it can really put a drain on your wallet but not necessary give you what you want.
I would suggest you look into getting a ham radio license if you like radio talk especially in Maine, you can easily talk for 100s of miles over the network of repeaters.  Most amateur radio operators are welcoming to new hams, we even have nets(group talking sections on the air -like meeting up on the repeater to chat) that help newbies learn.  Last night the Portland repeater - 147.090 group had the newbies roundtable net at 7p.m. to talk about grounding your station.  It had about 10 check ins.  The technicians(beginners license) is pretty easy to pass with a little study and opens up a world of bands and fun.   Check it out - lots of clubs and activities for amateur  radio or send me a pm if you want more information on getting licensed.