the injector pulsewidths are shorter for upgraded injectors as they can flow a lot more fuel in the same amount of time... stock tuning would dump way too much fuel into the engine... I think big oil would be a good addition too based on your mods... allows more from the tunes. there is a post from Bill
Here. post 4 has some graphs that give a good example of how bigger oil helps
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DJ Phoenix (my modded) Hi-1200/240Tow/75FS/80DD/100/140SS +Minotaur
ASE Master Auto Technician
2001 Ford Excursion 7.3 4x4
Projects. 1970's Hustler and Max II Amphibious ATV's