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Discussion Starter #1
I need a vacuum diagram for a 1974 350 with 2 BBL and AC. I have looked everywhere and cant find one and the chilton manual doesnt have one.

Can anyone help. I know this is probably been gone over a 100 times, but I recently got this car and I think a lot of hose were plugged or not on correctly.

Thanks
 

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Discussion Starter #3
Looked at those earlier, but none seem to match and they jump from 73-76, does anybody have a picture/diagram for a 74?
 

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Thanks for these. I will try to follow them. One other question is there is a round sphere by the AC and blower area. There are two plug ins on it. One has small line running to it and other hole is open. What is supposed to be plugged in to it? What is the sphere?

Also these diagrams seem to cover larger hoses, but there are a number of small hoses that plug in at various points, including the EGR TVS area. 4 of these small hoses go thru fire wall back to interior. What are these? Heating/AC vacuum lines?
 
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