Motor dies after startup.

Check the vacuum advance for the distributor. Leaky hose from carb to dist, bad diaphragm on distributor? Pull hose from carb and use a vacuum pump to see if it holds the cacuum. (or just suck on the carb end of the hose and stick your tongue over the end and see if it holds)
That's just one of the many little things I had to fix before my AZDart ran smoothly.

BC