Alright so Ive upped my goal with the truck and trying to see if this combo would work.

Trick turbo kit 76mm journal bearing
LS6 heads(P&P w/ bigger intake valves and maybe bigger exhaust valves)
LS6 cam
ARP headstuds with LS9 gaskets
Keep NNBS truck intake and put 92mm TB
Upgraded fuel rails w/ 90lb injectors
Twin Walbros or 304 Aeromotive pump w/ hot wire kit on either
4" DP w/ 4" exhaust


Is this going to get me close to 700hp at the ground? Will be ran through a built 4L80E into a custom Currie 9" with 4.10 gears and 35" tires

 

That should get you to 700 I'd imagine. You could even just use a NNBS intake and save yourself $600 over the LSXRT.

 

Will the NNBS intake that I currently have accept a 102mm TB? I believe it will, but just want to confirm before I start ordering

 

No, the NNBS intake will not accept a 102mm TB. For what you are trying to do a 102mm is not needed, just run a 90mm.

 

Cool! Thanks for the info. Now to start buying

 

How many cubes?

 

He may be pushing the limit of that 76mm.

 

4.8L. Should be enough?

 

i was gonna ask what motor this was on. is it a 4.8L? the goal is very possible, depends on what kinda boost you'll end up running too. is this being done to the truck in your sig above?

 

That turbo won't be choked by a 4.8, but you may need to run 18-22psi to hit that goal.