Holley carburetors powered every Monster Energy NASCAR® Cup team and nearly every NHRA® Pro– Stock champion for four decades. Holleymanual choke carb. Reconnect the appropriate vacuum hoses to the carburetor, noting the correct fitting from Figure 2a and Figure 3. Manual choke partsshown) 6.Replace any cracked or dry rotted hoses at this time to prevent any vacuum leaks. Guaranteed lowest price! Buy Holley 0- 1850S at JEGS: Holley 600 cfm Carburetor Manual Choke. Carburetorsandmore. We show you the best applications for this. HolleyModel 4160 Carb, 600cfm, No Choke, Vacuum Sec, Sold AS- IS, See more like this HOLLEY 600 CFM CARB CARBURETOR LISTWITH MANUAL CHOKE Pre- Owned Holley® has been the undisputed leader in fuel systems for over 100 years. Now, Holley EFI products power these cars and are dominating the performance world. The most popular street carburetor in the hot rod world is probably the 600- cfm Holley vacuum secondary carburetor, otherwise known as the 0- 1850. Installing Setting Manual Or Electric Choke On Holley Carburetor. Holley 1850 9 manual. This is a Holley carb that is being tested on a running engine.