[Clark Rodgers]

Hey Digger,
I'll throw in two things when you start the car cold have the air filter off and see where the choke is, which should be almost closed, and see where it is when warmed up.
Another thing is you might have a vacuum leak around the base of the carb or intake until the metal warms up and seals itself. Squirt some starting fluid around the intake manifold and see if the idle speeds up when its cold, this will find if there is a leak or not.