okay so im very close to being able to spray my car. already had the bottle and solinoids and lines. finally found a plate and bought it. ive never sprayed a car before so I want as much input as possible. the motor is a 355 HSR setup 27lb injectors, comp xfi 268 cam and EBL

first things first, what other parts will I need.
from what ive read a fuel pressure safety switch is a must.
currently running the stock narrowband. for sure going to get a wideband before I spray. also is a window switch a must? I have a progressive nitrous controller as well.

next thing I was wondering is the best way to run the fuel feed. I saw one guy here tap into the shrader valve on the fuel rail? sounds like the easiest way but is their anything wrong with doing it this way?

like I said im completely new to the nitrous world so any input would be appreciated