Zilla has you well covered.
My only other concern is how the N2O is introduced into the carb / manifold. Getting good (even) distribution is the key to a good running NOS system. Individual fogger nozzles are the best for this and "top shot" (above the carb) systems will simply follow the current manifold's distribution. Under carb. "plates" can be the hardest ones to get right on a SL6 because most are designed for V8s and will spray a bunch of juice on the backwall or directly into runners 1 & 6.
For low power "street / strip" set-ups, I tend to stick fogger nozzel right into the plenum area of the intake manifold and rotake them around for the best distribution. I have had good results doing that.
DD
