^^^This, especially when anything involving computers is involved.I'd say to do it right you'd need :
the wiring harness from the 2.0T along with all the computers
the trans from the ST (sure, a stick shift 5 speed would work, but c'mon...)
suspension from the ST ( sure, it would run fine on a N/A suspension, but c'mon...)
The ST has a lot of different stuff in it than just the turbo. It definitely would NOT be a plug-n-play swap.
Honestly, for the time, effort, hospital bills, and costs of equipment, and quarters in the swear jar you'd probably be able to buy a new GT mustang and smoke the an ST anyways.
If you are looking for a "sleeper", It would be so much more easy and cost-effective to buy an ST and stick Titanium front/ rear bumpers and skirts and spoilers on it.
That very well could be. And you could possibly have more gear ratio options.
I'd throw the 6spd on board. Yea you could use a $20,000 6-spd sequential Xtrax trans. The mtx75 will take a lot of punishment & you can get different gear ratios.But if you aren't autocrossing, then the 6 speed would be the way to go. For enough money you could get Ken Block's fiesta trans, but does not mean you should. I just see the extra hp and torque of the 2.0T turning a stock lil 5 speed trans into a blender