• To ALL forum users - As of late I have been getting quite a few private messages with questions about build ups here on the forum, or tech questions about your personal project. While I appreciate the interest, sending me a private message about these topics distracts from, and undermines the purpose of having a forum here. During the day I wear many hats as a small business owner-operator and I work tirelessly to provide the absolute best service possible to you, our valued customer. When I created this forum I rounded up some of the best minds I knew so that any tech question you might have could be asked and answered by either myself or one of my highly experienced moderators, this way the next time this same question is asked the answer can be easily found and utilized by the next IH enthusiast having the same question. This allows me the freedom to run the day to day operations of the business and minimize the impact to shipments and shop activities that these distractions can cause. It is of the up most importance for me to complete the daily tasks in order to best take care of you our customer, all the while providing you a forum to get the level advice and input you have come to expect and deserve from the premier IH shop in the country.

    So with that I ask that anyone with a question about one of our build ups or a general tech question to please use the forum as it was intended. I am absolutely available by telephone to answer your questions as well but at times may direct you back to our website to better field your question or questions. Most other private messages I will be glad to answer for you.

    Thank you for your understanding.

    Jeff Ismail

no ported vacuum port


New member
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

Robert Kenney

Super Moderator
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.


Administrator & Owner
Staff member
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?