Make sure the fuel pressure is not to high, had to add a fuel press regulator to get pressure down to about 2 lbs, carb was overflowing! lots of potential problems with vintage fuel systems, make sure tank, lines etc are clean and clear.
This could very well be the issue. The truck starts fine and idles perfectly. It runs fine and then just quits. Fierce pulling over I have to choke it to get it to start. But it starts and runs for about one block and does it again. And so one.
Don