Will an LS6 intake would be better than the NNBS truck intake from 7500 shift points and 8000rpm trap speeds?

Or if anyone knows or has links to a LS9 carrying power to 8k?

This is a roll race deal being built for the Texas Mile,

2012 Sierra 1500 RCSB 2wd
Under 3,700LBS on race day
4.8 SBE, filled to water pump
85mm+200 shot+E85+Meth?
TH400 + Gear Vendors O.D.
6,500rpm stall+4.56 gearing

 

NNBS is the better bet

 

I would run something like a Holley low ram for that RPM. Why a LS9 cam? That cam leaves a lot on the table for that setup.