Holley 9834-1 600 cfm dated 0590
So I haven't seen this before . There are no air bleeds in the main well. Can anyone explain this? The top metering block #10959 is off this 9834-1 carb and the bottom one in picture is off a holley 1850
IFR under brass plug ( have not pulled this yet )
Main jet #661
PVCR .054"
Air bleed none
Anti syphon .028"
Bleed in top of dog leg .039"
Emulsion tubes under brass plugs
Secondary metering plate #39
Jet .072"
Air bleed .029"