The first step in diagnosing a carb problem is making sure your ignition system is properly set up and functioning. What is your initial timing?
In your original post you stated you were unsure how to set the idle mixture screws. Do you have a vacuum gauge? If so after you have the ignition sorted start with the idle mixture screws two full turns out and then with the vacuum gauge hooked up adjust the screws out in quarter turn increments until you have achieved the highest vacuum reading. If the vacuum reading goes down or is unchanged try adjusting the screws in using the same procedure to find highest vacuum reading.