SS-Series Carburetor 780CFM VS SS-780-VS. 780 CFM - 4150 - Vacuum Secondaries - Shiny - Gasoline. Running alternative fuel or boost no longer requires an expensive custom carburetor. All SS-Series carburetors are equipped with universal throttle levers to accommodate Ford A/T kickdown, GM 700 R4 mounting holes, and ability to mount brackets for Chrysler vehicles.