I have a NX kit on my car and I want to add a Fuel Press Reg and Gauge. What do I need to make this happen??? I have the shrader valve all the way out since the NX kit eliminates it. I know I need some type of T but I don't know what the threads are on the Stock fuel rail. I think the fuel line is -4 or -6 but i'm not sure. Thanks for any help you have...