[mechanickeith]

Have built a BUNCH of these carbs down through the years. Usually a dead spot is just an adjustment to the accelerator pump linkage. 50 year old part gets wear at the linkage pivot points/sloppy. I bend the linkage till the pump starts working just as the throttle opens. Wont idle is usually a plugged idle circuit passage. Hardest thing with these carbs is rebushing the throttle shaft.