Need Help: Car Starts cold and then konks out and restart takes forever.....

I'm inclined to think it got flooded:

What is the outside temperature when this happens, averaged over the previous 3 or 4 hours?
How long after start-up does it stall?
What carb is on it?
does it have a functioning choke ?
with a functioning choke pull-off?
Have you tried to adjust it?
Is the vacuum advance hooked up?
Does it stay running if you pump the pedal? ....or does this make it worse?