Hey Matt, what's up? It's been a while!
MX Racer, how's it goin? I'm glad to see someone else wanting to do big-power mods to their 6.7. It seems like right now, most people are only doing electonics, exhaust, and other "play-it-safe" mods.
It appears that you're alot like me in the "BIG HP & TQ gains" aspect of things. So, this might be an interesting "tid-bit" for you?
On the I.I. turbo subject...They will build you one for a pretty fair price! Actually, about 5 months ago, I talked with THE guy that built that RAM 3500 6.7 for them (the one in the YouTube vid doing the dyno run). And he said that he would build me the same turbo they have on that truck, along with an Edge Juice w./Att., for around $2,500 for BOTH of them! And this was about 5 months ago!
So, if you want to go with a bigger turbo...call Industrial Injection, ask for Justin, and tell him that you saw the dyno video of the Performance Diesel Injection (PDI) 3500 RAM and you want one of those modified Phat Shaft turbo's for YOUR 6.7. He's a machinist, and is THE guy that designed, AND made that turbo from scratch!
ALSO, he told me that he made custom injectors (nozzles, or whatever you wanna call 'em) for that truck, and he could make me some of those as well, for a good price! He said they flowed "like nobody's business"! And, he perfectly matched and fine-tuned them for that particular turbo, to equalize the fuel-atomization / air ratio, for OPTIMAL Hp & Tq!!!
He's also really cool, so just call and tell him what you want to do with your truck, and he can "hook you up" with almost, if not, everything you'll need/want!
Hopefully this will help you out?