Theres no break in period for valvetrain. How's your oil level? Low oil levels can cause noisy valvetrain. It's either that, or you aren't doing the valve adjustment properly.
__________________
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