The mild stage 1 cams won't do much, I assume you are talking about the 402 cams. I would only get the 404's, but then you need springs & retainers, and headwork to maximize their potential, but they pull hard. I know someone that had 403's and were disappointed, wishing they had gone with the 404's.
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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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