25 yrs ago, I had the same thought about gps inside the car.  This was before cell phones!!  I'm not much of a tech guy, but I dont undestand why we dont have a product out there that can work with our smart phones??  If there was a tracking device we can program to our phone whenever our phone sends a signal to the device.  I believe this would be huge!  Im sure law enforcement would be totally against it, because of lots of reasons, ie; false thefts, jokes, false readings, safety etc...  I understand, but we as owners should have the choice to locate our cars.  We all know auto theft is not a police depts. priority, so we should be able to try to find our vehicles. 
Something you may want to try, if you know any good use car dealer, maybe they can put a tracker on your car for a small fee? Just a thought.  They use this technology to find cars for repo.

The $ 700 lo-jack only activates when you report it.  The car could be gone for hours before you discover it gone.  They sell a $1000 version that automatically checks its location for a key chain signal every 30 min.  If the car is not near the transmitter lo- jack will signal police w/out you doing anything.  Just an  FYI.

Cool topic!
We all know...if some @$$ wipe wants it bad enough.....they WILL get it. The trick is to slow them down enough to make them get scared of being caught and they take off.
I put my battery in the trunk(so that's locked up) and hide most all the wiring under the hood(looks clean and is hard to trace what wire to what component). I also have the little battery cut-off switch with a "unique" key to sorta slow'em down.
Friend of mine had an electric fuel pump with a hidden switch. The idea was to let the crook hot wire it....and the car would run until the fuel in the carb bowl was used up. THEN....they would be on the road somewhere and the engine dies.....the crook would panic and leave the car on side of road somewhere.
Sure....pretty primitive butt......most crooks are lazy and cowards so any thing to slow down their theft attempt and most of the scum will slither off to an "easier" victim.
Please re-read top two sentences.
6sal6

I had a pickup truck that got stolen a few times. I rednecked my own kill switch that was no hassle for me, but gave me good peace of mind. It involved a few relays and a door bell switch under the carpet.

To start the truck, I would press the doorbell switch right next to the high beam switch on the floor, then turn the key while holding the switch. If you did not press the switch it would honk the horn when you turned the key.

Juvinile, yes, but hey it was easy and cheap.

It sounds like you have a few upgrades, so you can play with disabling any of the three major components for starting the car: Fuel, Spark, Starter. Have fun with it.

As a side note, my brother installs LoJack and they have their own battery that lasts about 5 years. It is the size of a deck of cards.

BobN

It's hard to hot wire a car when there are no exposed wires under the hood!
I'll bet even an expirienced perp could not even locate my ignition coil.
Hide everything!

Aren't we talking about Fords?  My biggest fear is a screwdriver and a solenoid!  I mean thats it, thats all it takes. Besides getting inside the car.  The electric fuel route sounds the best to me as far as switches go.  But I would breathe easier with a tracking device and knowing exactly where my car is

http://www.dronemobile.com/features/demo/

I did run across one searching last nite....DroneMobile does that

 

http://www.gotrack.com/gotrack-3-wire/

Here's the link to the GPS tracker I've seen, and know the service works well in our area.  They have this 3 wire unit for discreet install, or non-obdii vehicles.