It requires basically the entire supercoupe motor, and the end result is not very much power gains. I would look into using an M112 supercharger (take off) from an 03/04 cobra. The kit (adaptor plate) can be purchased online or could have been (there is a guy that sells the kits)
The major issues used to be the stock hood may not clear it (they may have fixed this) and there is no cooling for it, so you have to run it without a way to cool that hot compressed air or run methanol injection with it.
Other options would be nitrous
(not good for daily uses.... and cant run it on the street) or build the motor (can get 200-225rwhp on a build 3.8 and more on a stroked 4.2L but thats costly.
Otherwise for the cash it would require you could sell and pick up a 99+ GT and pocket the rest....