[Michael C Henry]

The oem thermostat for an older Ford has a large disk and a small valve . The Chrysler thermostat fits .Has a large disk with a large valve like the balanced thermostat mentioned earlier.I went through this a while back. My car had a cobeled up arangement.Old large brass disk with a slightly smaller chevey thermostat glued in.I finialy found that the Mopar stuff works.