Kenne Bell or Roush TVS.
I went Roush TVS because I got a good deal.
I love it.
With a TVS, you will still need a Kenne Bell Boost-A-Pump (just like the KB uses). You will also need a custom snout pulley to lower your boost so you don't blow up your engine.
As others stated, the KB is plug-n-play.
You can't go wrong with either.
And forget about that car being a collectors car. Mod it, drive it, flog it...it is a Mustang...not a limited edition one-off boss 429 from someones barn. There are plenty of them.
Shelby has built plenty of crap, too. Remember the Dodge Charger circa 1985? How about the Dodge Omni GLHS ,<--Yes, the S is for Shelby. You could not PAY ME to take one of those. And some other cars with a "CS" in the name from Chrysler that deserve nothing better than to be shredded by a car crusher.
If I do it right, my "limited edition ultra rare collectors edition Roush mustang" (lol) will have nary an original part on it when I'm done, save for the body kit and interior. MOD IT!!!!!!!