[woodsnake]

You might try this:
Unplug 'half' the cylinders, 1 and 4 on the passenger side, and 6&7 on the driver side. Adjust the screws on the side of the carb (see the instructions that came with the carb) to get the best engine vacuum. THen, change the cylinders (hook up 1,4,6,7... unhook the others) and adjust for best engine vacuum again. You may get better results adjusting one side of the carb at a time...... Do you have a vacuum guage? They are no very expensive, and very imprtant to have on a carbed engine.....