How much?! Not suprised he is going thru head gaskets! u mean -31 actuator?

As Moonie says really, check all these factors, could be as little as a fooked thermostat, or as much as a cracked head/block. I would also suggest trying another header tank on the car also, as these can crack over time (likely his is now if it has expanded a few times and boiled over)

Also, is the radiator fan coming in properly? so also check the fan switch, I assume it is the old style pace cooler, (the one that sits to one side) so the fan is on the rad still?

Also, if none of the above works try another rad if you can....