First real drive! Not tragic but not good. I think I need carb advice.

[Chris64]

We need a pic with the air cleaner off. Need to see where the stray hose connects to the carbureator. In your second Pic that is the can for the vacuum advance,connect it to manifold vacuum. You still need to check accelerator pump shot. Put a piece of hose on the vacuum advance and suck on it does the diaphragm move you can feel the Plunger on the back with your finger. Does it hold vacuum or do you have to keep drawing on it?

OK - I finally took off the air cleaner housing - which was way easier than I was expecting.

With it off I did find an idle hose that I think came off that diaphragm so I put that back on. It didn't seem to change anything. I fiddled with the moving parts a little to see if they're moving cleanly - they are. One little adjuster I don't think I was supposed to mess with as it didn't pop back into place. Any idea what this is?

You must be registered for see images attach

Here's the pics from right after I removed the cover (before connecting the vacuum line)

You must be registered for see images attach

And also - this was that mystery hose - it was coming off of the air cleaner housing connected to something called AC. Thoughts?

You must be registered for see images attach

 

[RaisedK5]

See photo

 

[75gmck25]

Also get number off the side of the Quadrajet. For example my ‘75 Quadrajet is 7045583 YZ.

 

[75gmck25]

One strong recommendation is to immediately convert it to HEI ignition. It is very reliable, and does not require periodic adjustment like you will need with your points ignition.

Lots of large cap HEI distributors available from aftermarket, or you could even get one from pick and pull. Check the reviews carefully if you buy aftermarket, since some may have very unreliable internal parts. Not need to buy anything special, you just need OEM equivalent for 75+ trucks.

 

[SQ HAF KRU]

Need more pics, with air cleaner off....then people will be able to help

 

[Chris64]

well I also took this one but there wasn't anything interesting on this side.

You must be registered for see images attach

 

[Chris64]

See photo

So that one you marked in blue must be that second line coming from the air-cleaner.