Skip the Air/Fuel, go with the fuel pressure
Fuel pressure is more important than boost.
Air / Fuel is just something to look at (eye candy) completely worthless
If your worried about A/F ratio get a wideband done on a dyno.
97 Cobra. Bassani catted X-pipe , CDC Side exhaust kit, 4.10's, Upgraded 11" 26 spline FMS clutch T56 Magnum 6 speed. Forged Internals, JE 9cc Pistons, Vortech V-1 S-Trim 3.33" pulley, AFM PP SCT BA2400, 55lb/hr Inj. 501.71HP/415.4TQ on Mustang Dyno