No need to remove carb to fix problem, as it sounds like one side of the idle circuit is gummed up. To find out which side just spray a little carb cleaner into the throat of the carb with the engine running, one side at a time. The extra fuel in the good side will cause the engine to stumble, but in the bad side the engine will smooth right out. To clean them [might as well do both] simply shut off the engine, unscrew the idle mixture screws, place a rag over the top of the carb to catch the resulting spray and give a healthy squirt of carb cleaner into each idle hole. [Berryman is by far the best if it is available over there.] Follow this up with a good blast of compressed air. Reinstall the screws, all the way in and then back out one and a half turns.The car should now start and idle fine. Fine tune the idle to suit.