So, yesterday got an email from Mr. Injector regarding the old injectors that were installed in this thing.
(I replaced them with new ones a while back)
Sent them in to cleaning/testing mostly out of curiosity.

After cleaning @15psi they only flow ~62lb/hr ~3% less BEFORE cleaning.
According to GM they should be ~61lb/hr @ 11psi.
@ 15psi they should flow more like 71lb/hr
sqrt(15/11)*61=71.23

So with .bin set to calculate VE based on 61lb/hr = injectors weren't even close to delivering that.
According to rough math since I don't have the actual pre cleaning numbers yet...
The injectors were only flowing ~56-57lb/hr @ 13psi.
Would explain why I had to add so much to VE tables, and why I was maxing out.
Would also explain why bumping my pressure to 15psi helped somewhat.

So lesson learned...just because the pressure is good/steady/etc. doesn't mean the flow is