Cylinder head discussion 340 with stock above deck pistons

nfhDODGEnfh said
Not professionaly tuned but according to afr it seems ok? 12.6 at WOT? What's your recommendation

Stuff coming off my dyno runs at 13.1 to 13.4 AFR. Not all O2 sensors read the same. Tune for MPH and read your plugs very close.

Once it's tuned that is the A/F ratio your engine wants and what your O2 sensor reads. Then you can always tune to that AFR.