I went to the shop and looked at an original 70 340 carb. Here’s a picture of the arm adjusted according to the 70 service manual. Mine says a #38 drill bit which is about .101”. One of my Holley kits says 3/32” .937” for the ECS carb. The next picture is the same carb with a new from Holley vent rod install with no bending.


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Last edited by fastmark; 10/14/22 06:06 AM.