In general, your volume of air is limited by the total resistance (entire intake track) to air flow, the throttle bodies are probably a small part of that. If you gain any flow at all you will also gain some power. The odds are it will be minimal, therefore, the change in a/f at wot will be small.
You will not see it at all in closed loop since the O2's will try to keep you at 14.7. In that case you will also see the LTFT go up.