AC Vacuum Supply Adapter

[Kilian]

What's the part number for the adapter fitting that connects the small diameter supply hose for the HVAC system?

Something is needed to connect the tiny line to the larger rubber supply line coming from engine and cruise control vacuum hose. Thanks for the help.

 

[75gmck25]

Search the Dorman catalog online for various vacuum line adapters, and then see if a local store (Autozone, etc.) carries it in stock. I also bought a hand vacuum pump and it came with about 10-12 different hose adapters. https://www.dormanproducts.com/

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My SBC has a vacuum tree screwed into the intake manifold on the back, passenger side, and that adapter has multiple ports. The threads for the vacuum tree are standard, and you can buy the fitting with different vacuum line connections. Here are some suggestions.

https://www.gmsquarebody.com/threads/looking-for-vacuum-tree-tee-tap.45444/