Hesitation issues - need help

The AF screws dont affect idle transfer slot, its the idle set screw that does that. Normally, when you are tuning the AF, you are decreasing the idle screws, not turning them up, but the 'square transfer slots' base line is good advice that I forgot to add. Like I said, most new Holleys are pretty good out of the box. I think the HP carbs have the secondary adjustment up top now instead of under the flange like the old ones and have 4 corner idle so there are 4 transfer slots to square up. If it is rich at idle, the idle air bleeds can be altered in extreme cases if they are screw in. Just give them a shot of carb cleaner to make sure they are open. If they are plugged, youll get a very rich idle that cannot be adjusted with the AF screws as there is no vent to dilute the idle feed circuit vacuum signal. Set it back to stock and start all over and keep a log of what you do so you can refer back to it if something doesnt work.