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. They are popular for their wide range of application ...

1Begin by completely disassembling the carburetor. Remove both float bowls, the throttle plate and the secondary metering plate, if so equipped. 2Although the primary metering block from virtually any ...

There probably is not a mathematical formula complicated enough to calculate how many perfectly good Holley carbs have been tossed aside in favor of newer models, just because they needed a rebuild.