A fellow mustang buddy i know is selling a NOS kit for my car for $200 everything included, i dont know much about NOS and was just wondering if it would be safe to spray on my stock 5.0? and how hard are they to hook up? can someone give me a rundown on maybe some pros and cons? and also is it necessary to go with a purge kit or can i use it without it? My timing is also at 14 degrees so idk how that would play into spraying the motor..