Hi Guys, I need some help. I am installing a Holley 4175 on my 75 Grandville with a 400 motor. What vacuum source does the transmission use? Can I use the vacuum advance source? Brake booster source? Nothing is shown for connecting an auto transmission on the carb. I tried connecting it to a connector that was in the same general location as the old connection on the Qjet. Transmission now does not shift correctly. That port is called "purge". Whatever that is. What do I connect the transmission vacuum line too??? Thanks.
