Could you please tell me if the Holley carb in these photos has mechanical or vacuum secondaries? I don't know much about these things. No time like the present to learn, Arron. If, as per your photos ...

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 ...