Well i am getting an education on heater valves, i sent in the valve i found for this 53 willys and the rebuilder says it cannot be fixed because it's a harrison valve and the gas filled little round thermostat on the back was damaged,Ranco valves did not have that . Seems willys used both ranco and harrison valves,no problem with Ranco valves but harrison valves are quite a bit more difficult to get apart and some rebuilders will not even do them. 49-52 Chevrolet car used the same valve and the same case apply's they used both harrison and ranco valves also .