it will bolt right in. use all of your mustang wiring harness. the only problem is the plumming for the intercooler.
A. you can use the stock intercooler but the drawback would be you would have to use the T-birds radiator. which is smaller.
B. (better solution) use you stock radiator(mustangs radiator) and custom fabricate the plumbing for the intercooler. you can also use an aftermarket intercooler.