the only other thing you can do is upgrade to a nv5600 ,but I would say turbo

 

I don't see studs listed in your sig. If you don't have them yet, that would be a wise move next, and then look at a turbo swap. With the AirDog installed, you'll run out of air before you'll run out of fuel. Your stock injectors will handle all that and then some.
Ask Lucus (dodgeram082500) what he's put down on the rollers running stock injectors. you'll be surprised...
If these suggestions still leave you wondering what to do with that money that's burning a hole in your pocket, put it all in an envelope and send it to me. I'll put it to good use for you.

 

U need head studs soon and u could also use valve springs then i would go with Industrial Injection Phat Shaft 64 or 66. Then DDP injectors and Mod. CP3

 

Yup yup, intake manifold helps quite a bit, black ops and lovefab are makin some good ones, but they are custom made and take forever to order, but well worth the wait. And possibly look into a compound turbo setup so you don't have to lose your exhaust break

 

 

Installing the Airdog?

 

STUDS 425 probably fine

Waste gate kit (not sure if this has hit here yet but goodness I hope I didnt just start a fireball) it goes great with the studs to help protect you headgasket and frees up som HP and torque while it protects the HG

Air Intake Mods (boost tube/Intake Horn) Thanks for the BOD mention there Boss and sorry if you ordered one and it took forever, I got my butt handed to me with them things for a long time with orders holly goodness...

Fuel Mods (injectors 90 HP probably) CP3 upgrade like the DIY arson II kit is nice and relatively cheap)

turbo silver 66 is always a favorite for a single

 

i think i will put a black ops waste gate on my 08

 

a little late now ,but I was wrong in this quote there are g56 upgrades out there