Injector Deadtime error versus STFT

I'm tuning on a P01 PCM for a 3rd gen Chevy small block, aka LS setup. It's using a MAF sensor (and MAP for dynamic airflow). I'm trying to wrap my head around injector characterization... Specifically Dead time.

I'm wondering, if my injector dead time is wrong, would I see the trims stabilize out (0%) for high load but not low loads on my VE / fuel trim logs? If so by how much would they vary? Like 20% error at low RPM & load, say I have a zeroed out dead time table?

BACKSTORY: I'm tuning on a Delphi / GM P01 PCM. Starting to second guess myself about injector characterization. My engine is a cammed 6.0L LQ9 built transmission and a few things one of which is swapped injectors. I swapped in Flex Fuel Injectors. This is a common modification to get an inexpensive higher flow injector. They come from a similar GM engine, the L59 which is the flex fuel version of a 5.3L and also uses the same model controller. This makes it easy to transfer characterization over from that tune to the engine I'm building...

I've been chasing my tail for years over the characterization for these injectors. I can pull down tunes that say they are stock from repositories but depending on the year the characterization is different. I also learned there's two part numbers from Denzo for the same injector.

Additionally, I'm running a 4 bar regulator when the engine I'm pulling the characterization data from specs a 3 bar regulator. Easy enough to scale flow rate but the dead time and other tables?