I concur with the others here:
-Replace the plugs with a fresh set--they are fouled (I agree that they foul easily with the choke on these cars--do not use to much). If a fresh set of plugs is not available from the local NAPA, pick up a good wire brush and clean them. A bit of help from a #2 pencil on the electrode is also an old trick to help get them going again. I always keep a spare set of plugs in the car, and the necessary tools, just in case. Make sure they are gapped correctly, as noted.
-Check the points gap. If you have not adjusted it in the last year than it is most certainly too small, and you were tuning the carbs in vain. A couple thousandths of an inch makes a big difference.
-Once the ignition is back in tune, you may need to resort your carbs, including the idle speed adjustment.
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