Which carb number and is it a replacement or original? I have 17 Six Pack carbs. I bought 2 sets of gauge pins and have pined all of my carbs. There is a variation from original and replacement carbs. The pins are not that expensive if all you want to measure is air bleeds the small set would cover that up to .060. That being said the outboard carbs varied from .027 for replacement to .039 for original HSB .052 and .068 for IAB. The center carbs measured .026 to .028 HSB and .065 TO .073 IAB.

Hope this helps