Wait until you go LSVTEC to do anything, because you'll be switching ECU's anyways. And you'll have to get an OBD2-OBD1 harness, and an OBD1 ECU. There aren't any chips for the OBD2 ECUs. I wouldn't waste your time or money though, its not worth it.
__________________
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