I have a 71 402 that is completely stock. Have had the carburetor rebuilt and the car runs well. If i don't use the car for a day, when i go to start it, i have to physically pump the pedal at least ten times or more to get gas into the carb so it starts. This is after i depress the pedal to set the choke. Is this a symptom of the choke not being set up right or a leakdown in the carburator?