Fill the rad and res to HOT mark, Then I want you to follow the upper rad hose to the Lower Intake manifold where the Thermostat housing is. Then on top of that is a small bleed screw, should be a 7mm or 8mm socket. Then you should turn it open 1-2 turns.
Go start the car and allow it to reach operating temp, this will take 5-10 min prolly. At this time, you will most likey see coolant start to come out of the bleed screw along with air, wait till the coolant coming out is a steady stream with no air bubbles, this may take a while aswell to ciculate all the air and coolant around. Once its a steady stream, close the bleeder and go take it for a drive to see if it still wants to over heat.