That would be a cool place to purge the nitrous but I don't think it would work to well. Remember, you have to open the hood every now and then.(more because its a viper
) I bought a blue lighted LED purge for my car and mounted the purge valve inside the fresh air intake on the passenger side so it will purge out through the grill. It is cool! Sprays through the grill and it is blue in color. Through the duct would be different as well if it will work.