Your stock fuel pump will be fine. In addition to retarding ignition timing, make sure you run one heat range colder than stock, copper plugs, and gap them around .030" since you'll be running nitrous....I run NGK BKR7E plugs in my car. Octane booster doesn't do anything good, and it leaves deposits in the injectors and such.
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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