The cars WITHOUT the oil cooler have two hoses running to the top of the water pump: one is the thermostat bypass, the other is the heater line from the tube on the lower intake. For the oil cooler, you remove the heater line and take two sections of 5/8" ID hose and run one from the tube on the intake to one fitting on the oil cooler body. Run the second hose from the water pump (where the heater line used to go) to the other fitting on the oil cooler body. Hope that helps!
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