I assume that your block is built if you're gonna be running an LSVTEC on 14lbs of boost. This being said, if you're gonna be boosting the JG Edelbrock manifold will be good for your application. Its large intake plenum is great for boosted application, and will yeild some decent gains over the stock manifold.
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2015 Ford Mustang GT Fastback - Ingot Silver - 6M - Performance Package - Gibson Catback, JLT CAI, FR 47lb injectors, BAMA E85 tune, Eibach Sportline, BMR wheel hop kit, UPR oil separator, Steeda shifter bushing/bracket
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