The Stovebolt Site Forums The Shop Area General Truck Talk Offenhauser manifold and wiper motor connection

You could use either port on the intake for a manifold vacuum source. you can get adaptors that plug in to hook your vacuum hose to. Or there should be a vacuum port on your carb. What kind of Holley are you using? I run an Offy and Holley 350 2 barrel on mine.