Thats quite a pressure increase for not a lot of compression...you're gonna be dumping gobs of fuel in. You should be fine at the stock fuel pressure or maybe just a couple PSI over stock, and on the stock fuel maps, after all that's the same CR of a USDM ITR. I would just go up a few psi on the fuel, and check your plugs to see how the car is running.
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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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