If it were me, I'd buy an LS or RS, and then a GSR engine for turbo, so you don't have downtime for the car while the motor is being built. There are a lot of turbo threads in this forum if you use the search function. Welcome.
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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
Team B.O.B.® - Ballaz on a Budget