If you are in the midst of a good old fashioned bench racing session about your favorite high performance engine, at some point the name Holley is bound to turn up. As talk turns to Holley carburetors ...

A case in point is this adjustable metering block derived from the stock metering block for Holley's PN 7448-350 two-barrel (2-bbl) carburetor. This unit was originally designed as a 350-cfm Ford ...