Help Identifying engine elements

Jacksonrobinson

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Cleveland, TN
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Jackson
Truck Year
1980
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C10
Engine Size
305
Hello, new C10 owner, and I'm trying to do some engine clean-up. I need help identifying two engine elements, that both seem to be pulling vacuum. Please let me know what they are and if and where they need to pull vacuum from. I couldn't seem to find them on the vacuum diagram. I've also included my C10's vacuum diagram if it helps.

1980 Chevy C10 305 TBI

Thanks for your help.
 

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matt4426

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NE Ohio
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Matt
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K35
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454
The thing in the first picture is the vacuum reservoir for the AC unit. The dampers are vacuum actuated. Not sure about the 2nd picture. Maybe vacuum switch/sensor for transmission?
 

PrairieDrifter

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Do you have a turbo 400 trans.
 

Jacksonrobinson

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The thing in the first picture is the vacuum reservoir for the AC unit. The dampers are vacuum actuated. Not sure about the 2nd picture. Maybe vacuum switch/sensor for transmission?
Ok thank you, do you know if the AC Vacuum reservoir needs port or manifold vacuum?

Thanks for your help.
 

saltdog

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Second pic is the torque converter lockup switch, lower right in the diagram pic 3
 

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