OK guys, let the lessons begin...

What is the Stock MAF range in HZ and lb/min on a 5.3L? As Allen was so quick to point out, my current tune is showing injector duty cycles of 105 to 107% @ 20 ms on 42 lb injectors and MAF freq readings at 12000 @ 5500 and sucking 60 lbs/min. At what limit will the stock MAF be maxed out. I just bought HPT so be easy on a brother (cult memeber).

Thanks