Pedro, here is what I have for a set-up. I think its probably the one of the better ways to go, especially saftey wise.
All Products are NOS
LS2 plate kit
Progressive Nitrous Controller
I bought an extra bottle to mount in the rear as a spare
Pressure controlled bottle heater w/ thermostat
Purge Kit
TR 6 plugs
The plan is to launch the truck with small shot, maybe 50 or 75 then quickly ramp it up to 150 while reducing the spary during shifts. Even with a built trans I was hesitant on a full spary down the track but I still want to try it. All that, with two bottle fills, and some misc relays / switches / wire was $1700.