Does the exhaust stink when warmed up at idle? If so you need to lean down the idle mixture to help it not bog.
If it doesn't stink try enrichening the idle mixture screws a 1/4 turn at a time to see if that helps get rid of the stumble scope thumbs
You can make a carb stumble off idle by being to lean or to rich whiney shruggy
Do your squirters squirt fuel as soon as you move the throttle shafts any at all? If not adjust the screw so it does up
What brand and size is the carb?

Last edited by Cab_Burge; 04/04/19 01:11 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)