Alright youngin' here ya go. Use the search feature as this has been discussed MANY times before. Basically, find yourself an '87-'88 Turbo Coupe to use as a donor car. Remove the turbo motor, T5 transmission, 8.8 rearend, LA series computer, front spindles and brakes, parts of the wiring harness along with a ton of various other pieces and install them into your '87 Mustang. Yes they all fit! There are many articles out there outlining exactly how to do it. It doesn't look like your old enough to drive yet so I would suggest saving your $$$, keep an eye out for a decent running TC and start researching at websites such as
www.turboford.net and
www.stinger-performance.com while you're waiting to come of age. In 2 years you should be able to acquire a TC, expand your 2.3T knowledge and have your car built and running by the time you're 16! Best of luck to you young man!