Good used Buick thermostat housing (water outlet) p/n 1380207. Some light corrosion, but the die-cast aluminum is still very solid, including the heater and rad hose fittings, and gasket surface. See pictures for details. This is an original part, not aftermarket or reproduction. Note the Buick p/n cast into the housing.
This fits 65-74 Buick engines except L6. This includes 225 V6, 300/340/350/400/430/455 V8. See attached screen shot for applications, as shown in Buick parts catalog.
Prefer local cash transaction, but will ship at actual cost if pre-paid with PayPal. Thanks for looking, and check out my other Buick parts for sale.