1973 Holley 1920 Accelerator Pump Question - Stumble Off Idle

Thanks! I thought maybe that was the one. You said it's in the hole closest to the pivot point, correct? I believe that's right for the longest pump shot. I'm sure someone will correct me if I'm wrong.
I think its correct as well from what Ive read, but wanted to be sure. The stumble is frustrating, besides that it runs awesome. Thanks for replying!