Assuming your motor is in good shape, ie compression #'s, you'll be fine.
55 shot - stock timing
65 shot - 1-2 degrees retard
75 shot - 2-3 degrees retard
NGK BKR7e or 8e plugs, gapped at .030". DO NOT use platinum or iridium plugs with nitrous, only NGK copper.
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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