In the picture, the hose #16, what is its purpose? I know its not for a heater hose, and I have both of my radiator hoses hooked up. What is it's purpose? Oh, and I wasn't going to run coolant through the throttle body, so do I need it? I was hoping to cap it off, since I don't really have anywhere to plug that port into. What did LT1 swappers do?