1987 318 Tuning with Summit Carb

Hysteric said
Yes you do. You can buy a numbered drill bit set and if you have accurate Vernier calipers you can can verify the drill sizes and use the to check bleed and restrictor sizes.

I can't find where the idle circuit gets fuel from and at the moment, I don't have a numbered drill set. Here's a pic of the fuel bowl. Can you see where the idle circuit is fed from?