What size thermostat does a 1988 Lincoln town car with a 5.0 engin need?

What size thermostat does a 1988 Lincoln town car with a 5.0 engin need?
I was looking at one of the Ford websites and it shows :

For a 1988 Lincoln Town Car , 5.0 liter / 302 cubic inch V8 engine :

( Motorcraft RT-1139 engine cooling thermostat , 190 * Fahrenheit )