I have the engine out of my 89 gta and I am changing some things around. I am going to dump the air pump to free up the engine compartment. Where my heater hoses connect off the oil cooler on the passengers side there is some type of T connection and a valve of some kind. (black plastic and sets up on top) Can I run the hoses in a loop through the oil cooler and heater and back? Like the old cars had. Do I need the T and valve?