Nitrous Oxide - Spraying a supercharged truck

I'm running a intercooled roots type supercharger on my Tahoe.I'm looking to try to spray into the intake manifold past the liquid to air heat exchanger to further cool the boosted air into the motor.Is there a nozzle that would work going straight into the intake manifold?I'm thinking about using a wet system with propane on the wet side.Has anyone got any ideas on what would work best?I'll probably use a 50 shot or less.

I would spray the wet rite before the throttle body. Spraying wet before your exchanger would probly make the fuel puddle in it. That would shure suck. If you spray 50 you might get 70-75 out of it due to the way cooler charge. Depends on how much boost and heat your making I guess.