New water neck of thermostat housing for most 1967-70 Mercury Cougar or most other Fords with 390/427/428CJ engines. Cast aluminum without casting marks, sand cast finish. Comes with screw-in cap in place of the thermal switch if you like, includes gasket. For use with common 2-1/8 inch thermostats.
*Note - very early 1967 cars were still using the 2-1/2 inch thermostats. Cutoff was around November 1966.
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