Carb tuning help

Is it electric choke / those are jetted leaner. I agree the Carter / Edelbrock carbs are better for idling...the Holley can be made to idle very well but the Edelbrock carb will always be a bit better.

The secondaries may need to be jetted richer..maybe my eyes are shot but I can not see those tiny numbers on the jets. I use wire drills and a mic to find the size I want. Small changes make a big difference and both the primaries and secondaries need to be right for best power.

Try going up .003 on the secondary jets..might need to go .006...each jet is .003 larger.

To get the Holley to idle better the idle feed restriction brass hole in the metering block might need to be open up a few thousands..like .003...helps to decease the idle air bleed but only HP carbs have removable air bleeds in the air horn...you can tap them thou or use epoxy to plug and re-drill.

Shot for ,065 on the low speed air bleeds..those are the outside bleeds..and .030 to ,035 for the meter block idle restriction holes..you might want to google for more infor.