I have a 90 gt that i bought. It already has a nitrous efi Part# 05115NOS kit. Its missing the fuel saftey pressure switch and fogger jet. But the kit works. Car has 347 with afr 205 solid roller cam b50 block long tubes 3 inch exhaust elderbrock Victor 5.0 and 80mm throttle body. 42 lbs injectors and 80 mm mass air and 255 walbro. On thw vacumm bypass tee, it has a 42 jet. What should i have for a nozzle yet for a 75hp shot. Do i need to put on the fuel safety pressure switch? Thanks for the help. Car has a t56 and when would it be best to spray? 3 rd 4th?