Would be easier to use Department of boost manifold they just released it check it out. Just google department of boost. Can put the entire m112 gt500 set up for about 3500-3900 cheapest set up out there for 550-600 hp on a coyote sans nitrous(cheating) lol.
Definitely go with DOB. I have their kit on my 2005 GT and it is awesome. I'm looking to sell it pretty soon so all you would need is the new manifold for the 2011+ models if you want my stuff.