S-AFC or FMU...neither offers any type of timing control.
You need something to retard timing if you're planning on any more than 4-5psi from that T3.
You can knock the base back a few degrees and be OK in most cases...but that's not a definite.
A retuned ECU (like the JWT setup) is very safe and reliable, but will not make the most power, due to the conservative nature of the timing curve.
Bear in mind, fuel is only half of "tuning".
Timing is what blows KA-Ts...you can run pretty lean and not detonate, but too much timing will kill it quickly. FYI...