Your new carb was set by the manufacturer, but at what fuel pressure, with what fuel, and with or without an aircleaner? You need to set them again, on the vehicle, in real life conditions.
Totally agree, I've been working on Idle and transition circuits, on way to accelerator pumps step by step, using midway sight glass float levels, but will readjust and do the tube deal, and start fine tuning again.
