For your Mopar: Thermostat "Neck" &Housing. MoPar to ya! Upgrade kit.
Crossover Water Outlet Gasket OEM Mopar 4893786AA 04893786AA
Crossover Water Outlet Gasket Genuine Mopar 68083133AB
Genuine Mopar Seal Water Outlet 4429697
Engine Coolant Water Outlet Tube Mopar 68280800AE
85720B Engine Seal Water Outlet Gasket 85720B Water Outlet Gasket
1953 - 1966 Buick Nailhead Water Manifold Gasket Set Water Outlet & Thermostat