I checked all the ground connections to see if they were clean and secure but no improvement. The one connection I missed was the cable from the solenoid at the starter. That is located in the heck hole underneath the carbs near the bottom of the header. In order to gain access I had to remove the rear carb and it's heat shield. I was then able to get a wrench on the the cable bolt to have a look at the cable end. It seems that the wiring under the cable end was coated with road gunge and oil creating a high resistance. I cleaned that up and put everything back together and now the car starts right up. My voltmeter gauge seems to read more correctly now too.