any idea what this t-stat housing is off of??

Mopar NOS Eng.Thermostat Housing 58-66 Plymouth,Dodge, DeSoto,Chrysler,Imperial

[ame]http://www.ebay.com/itm/Mopar-NOS-Eng-Thermostat-Housing-58-66-Plymouth-Dodge-DeSoto-Chrysler-Imperial-/301135651268?pt=Motors_Car_Truck_Parts_Accessories&hash=item461d1561c4&vxp=mtr[/ame]