Slant 6- Idle and Running

There should be a plug in the circled hole. It could be a manifold vacuum leak. Stick your finger over it when running and see.

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Post #29. Thought it looked "pretty vacant" myself. I got 3 in the garage, 2 with...both are blind holes. Not there.....CA smog cut off is 1975 so he's clear of impossibly passing in a 1976 or newer carb motor here with all the visual checks. I had a vacuum hose that the guy didnt 'feel' was going to the right location (air cleaner snorkle shutter) and he didn't have a book on this Federal model. So he referred me to the (district) smog referee at a somewhat local community college, @ a 2 week appointment date (and extension), and the appointment was a 30 minute window in the middle of the F'n day that I could not miss or else I'd lose my extension and be open to get pulled over and towed. So the clown looks at it and says its a Fed motor (49 state) and writes it down on the form and then I bring up the fact that the very first smog attempt was waived off because the motor was over-revving at 25 MPH test speed (Documented...no F'n lie, the guy said I could not dyno test in 2nd gear!) and I asked him to explain HTF can I possibly pass if you (CA) wont test it in 2nd gear: its gearing, not smog equipment failing! He looked at me with the most condescending suck and slowly wrote a memo saying OK to test in 2nd gear. GD I hate this place when it comes to **** like this.