Looking at the front of the engine, What is the fitting coming out of the WP at the 2:00 position? A hose runs from the fitting to the radiator. My car does not have a oil cooler and I have seen them plugged on other cars. I'm installing an ATI D1-SC and it calls for the tube coming out of the WP to be rotated 90* up. I was wondering if I could just plug that fitting and not have to worry about running a coolant line over the head unit.

 

Assuming you mean the smaller hose at about 4 o'clock, yes you can plug that. It is where the bypass hose goes to the radiator on cars with no oil cooler.