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I looked into service manual to see any kind of hose connecting to the bottom of the STV and it looks like there is none (black part in picture below). Am I correct?
If you are going to bypass the STV you can just cap that off with a rubber nipple. If you are trying to rebuild the STV you will need to hook a vacuum hose from your manifold vacuum fitting to it. I will try to see if I can find a hose diagram for you. I am traveling right now so might be a little slow unless someone else comes through.
It is hard to follow but here is the hose routing for the vacuum lines from the manifold to AVR at the bottom of the STV valve and it tees into the vacuum line that goes to the heater control valve on top of the distributor assembly inside the car.
A few years ago I did a hand drawing of how the vacuum lines are drawn but I have not located them yet. They are on the forum somewhere.
Hi smacota1. Thank you for your further information. I am not sure I understand what you said. I will have to read your comments together in front of the car to see I can trace it.
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'64 Factory AC STV Bottom
