Holley stumble trouble

Update:
Removed carb. T-port was at .045. Closed it up to .035. Lowered secondary jets to 77 (not related to the problem, just wanted to do it while carb was off). Installed white pump cams in #1 position (how it initially was before I started tinkering. Verified idle timing at 22* with can disconnected. Backed idle mix screws out 1/4 turn each.
The idle was down to 650 rpm now. Went for a cruise. Stumble had improved slightly. Wasn’t happy with low idle so I turned curb idle screw in 1/4 turn to get back to 800rpm. Continued to cruise and it seemed to improve a little more. Came home and swapped in a 37 shooter in place of the 31. Haven’t tested yet.