The easiest way to convert your car to automatic is to get a automatic parts car or swap your automatic parts with someone looking to switch to a 5 speed. The swap is not all that difficult you will need to change the pedal assy. or just leave the stock pedals there and disable the clutch pedal. Install a automatic shifter as well as replace the computer with a auto computer. Ther are many websites like corral.net as well as mustang parts suppliers where you can get everything you need as well as info.