No, the I post would have only 9 Volts or so due to the resistor wire during the time the key is in RUN position.
Another wire is the green/red wire going to the voltage regulator, but only if you have an ammeter in the dash cluster.
I'm placing my bet on the carb: that the secondaries aren't opening due to some mechanical interference or lack of vacuum. Yes, I know carbs were swapped, but the symptoms just reek of lack of fuel. JMHO.
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