WANTED: Slant six Holley 1 brl carb (Preferably 1920 model)

I recommend against another Holley 1920, unless it is guaranteed good. My 1969 slant always idled rough, wanting to die when leaving a stop light, despite going thru store-bought rebuilt carbs, plus trying to rebuild myself. A 4th carb finally made it run perfect (after 18 yrs, rebuilt blocks & heads, finally a rebuilt long-block). You can't inspect the sealed metering block in the 1920. Some guys here say they now how to blow them out w/ air. Several mechanics looked at my engine, saying "bad valves", etc, but just took my money and never fixed it.