64 Dart 273 Engine Vacuum

First thing to check is do you have spark and does it have fuel in the carb. A bad condenser can cause your issues.
It has Fuel, it has spark and it has compression.
Bingo, I found the problem and it is the Distributor Condenser.
Never saw one the would start and run for 20 second and the crap out.
Most of time just bad and will not start at all.
Thanks for all the help and input.
Bob