It bounced back and forth cause you did not remove the oem compass which i located in the center speaker in your dash board. Remove it and put the new gps sensor where the oem was. Maybe car wont restart cause your battery is dead.
Your wrong the car has evolved for six generations going to the 7th in a couple of years.
With your thinking the car would have never evolved from the first generation.
The perfect outcome would be an awd v8 mustang with the option of hitting a button which would switch it to rwd.
Also it needs to loose weight maybe do it a little smaller an use lighter components.
My ac compressor also failed car has 14,500 ford also denied me the warranty had to buy it $300.
Service tech told me it had a leak they used freon with a dye said most probably the internal seals got damaged.
Before this the ac evaporator failed car had 10,000 miles but that part they gave it...