Yes, I agree, if MAF is good, then concentrate on OL/MAF-less/AutoVE (but lets use thepid CALC.WO2BEN from Calc.VET to do this, if possible)... so you will have time to play with HO spark table... try running the 2002 F-car HO table, but keep an eye on knock during load... I don't think you'll have any problem.
When you get those numbers right, you will see instant response when doing a throttle WOT snap open.Furthermore, I think the fueling is pretty darn close at least at every RPM/MAP i was able to measure on the streets. I didn't do much work above 4000/low KPa, because the truck was accelerating way too fast to collect frame counts up. Hopefully getting into those cells on the dyno will increase the peak #'s?