[WVZR-1]

Originally Posted by Dynomite

Also.....have not looked closely yet but......are there any changes in the Thermostat Housing and the associated Heater Hose Connections?

Never understood the way those Heater Hose Connections Functioned without leaking

The seal is internal to the housing #40 in your image. Your next visit to an AP store ask to look at a Dorman 800-401 or their equivalent to a GM #24503682 and you'll better understand. There were no changes that I recall to end of production. Instead of the seal being added to the pipe as in Saginaw style fuel and power steering fittings the seal was included into the coupling. Operation is nearly identical.