I realize this question is best suited for the Power FC forum but people spend more time here so I am posting it here as well.

I have the upgrades listed on my signature. Currently I seem to be running a bit rich, at least at low rpm's. I'm going to be putting on a high-flow cat soon. I know that the default PFC program is supposedly for cars with only an intake and a catback. Will I be risking running too lean if I put on the high-flow cat before getting my PFC dyno tuned?