SB Intake
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Fleet Mechanic
Joined: Jan 2004
Posts: 1,685
Likes: 1,471
From: Mendon, Massachusetts
SB Intake
you guys ever see one of these intakes for the 289-302 SB? After market intake manifold for the spread bore carb. 
Last edited by moejr; May 20, 2021 at 07:37 PM. Reason: mistake
Lead Driver
Joined: Sep 2003
Posts: 7,015
Likes: 208
From: SoCal
Speaking of POS carbs, (hijacking thread), I was recently checking the manifold vacuum on the base port of my Holley 600 CFM vacuum secondary carb, and found liquid gas in that port. I something is leaking fuel into that area of the carb, but what could be the most likely source? I'm sure the last time I serviced it, I replaced all its gaskets with new.
Lead Driver
Joined: Sep 2003
Posts: 7,015
Likes: 208
From: SoCal
The port in the front passenger side of the base plate of the carburetor that leads to the inlet of the intake manifold. I usually connect my vacuum gauge to it to measure manifold vacuum. See this pic:
https://photos.google.com/share/AF1Q...ZEOUVmWjRfSFl3
Just below the front fuel bowl is a short vacuum hose plugged with a screw. That hose is connected to the port (nipple) that I'm referring to.
https://photos.google.com/share/AF1Q...ZEOUVmWjRfSFl3
Just below the front fuel bowl is a short vacuum hose plugged with a screw. That hose is connected to the port (nipple) that I'm referring to.
Hotshot
Joined: May 2003
Posts: 11,141
Likes: 25
From: south louisiana
The port in the front passenger side of the base plate of the carburetor that leads to the inlet of the intake manifold. I usually connect my vacuum gauge to it to measure manifold vacuum. See this pic:
https://photos.google.com/share/AF1Q...ZEOUVmWjRfSFl3
Just below the front fuel bowl is a short vacuum hose plugged with a screw. That hose is connected to the port (nipple) that I'm referring to.
https://photos.google.com/share/AF1Q...ZEOUVmWjRfSFl3
Just below the front fuel bowl is a short vacuum hose plugged with a screw. That hose is connected to the port (nipple) that I'm referring to.
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Lead Driver
Joined: Sep 2003
Posts: 7,015
Likes: 208
From: SoCal
That port in the base plate goes to the area just above the manifold, as I said before. That was what I found when I had it off before. The other nipple further up is the throttle port, which I connect to the distributor vacuum advance. I guess I can just pull the carb and check it again, but since that involves spillage of gas, I want to make sure what to look for before I do it.
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