hey guys, my 1977 Z is under the knife again, this time for a complete interior restoration. Currently I am doing a full rebuild of the HVAC unit inside the dash down to the bolt. (AC box, heater box, climate control module, etc). I have everything apart and have a plan for pretty much everything except the heater core/vacuum water **** and the temperature control water ****( apologies if this is not those valves actual names). As you can see my vacuum water valve was leaking bad (I ac