Do you run with the rear doors on? Is there any sort of insulation in the box part of the van walls?
Ac compressor worth 30lbs or so. Use Dorman AC delete bracket 34158?
Id install a fresh CP3 to help try to maximize rail pressure.
Already have 3" I/C piping?
Send the turbo to yellowchevy for one of his port-n-polish jobs? 20hp is 20hp...
Nitrous a given.
Didn't Steve Cole used to spout off about one of the trucks he tuned running 10s with stock turbo and a boat load of nitrous waaay back in the day? Buck maybe? With the fiberglass bedsides? I have no idea how built it was but seems silly to build an engine just to put the stocker back on?
Several years ago I watched Trent do an 11.04 at Rocky Mt. Raceway. At that time the truck was still a daily driver. Weight was 5900lbs. I don't know how he got it that light, or remember which turbos / injectors it had. But the engine was stock LB7 internally. And the rods were bent after that run.
Can of ether?
Ether and intake air heater don't mix very well.
I'd swap the rear diff out for a 9" or something along those lines. Huge difference in weight!