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Old 08-06-2019, 05:15 PM   #1
alaskasmitty
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Default no ported vacuum port

Recently acquired a 69 800A with a 266. There are no ports at base of carb. They had the distributor vacuum line going to manifold vacuum, which I-'m sure is not correct. Its a Holley carb mounted directly to manifold. Should there be some kind of base plate?? Any help would be appreciated. Also looking for dwell and timing specs. Mahalo
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Old 08-06-2019, 05:54 PM   #2
Robert Kenney
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Default Re: no ported vacuum port

Both ported and timed advance configurations were used. You have ported. If it works well I would leave it alone. You will need to unplug the advance vacuum to set initial timing.
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Old 08-07-2019, 05:36 AM   #3
ihpartsjeff
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Default Re: no ported vacuum port

Some Holley carbs back then had the ported vacuum source for the distributor coming from the side of the metering block. Does your carb metering block have a brass plug on the side of it?
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Old 08-07-2019, 12:24 PM   #4
alaskasmitty
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Default Re: no ported vacuum port

Yes it does have brass plug. I will get hose barb fitting and check it out, Thanks
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Old 08-07-2019, 12:26 PM   #5
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Default Re: no ported vacuum port

Still looking for dwell angle and timing specs, or a good link
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