Stalling Out

Pull the choke spring assembly out of the choke well on the intake manifold and see if it has a nut on the side and some markings on the side of a small plate on the spring that has scale markings with L and R at opposite ends of the scale. Loosen the nut and adjust it towards R (rich) a step and re-try cold start-up. This will keep choke engaged longer and more and help your cold-idle-in-gear issues. You may need to re-adjust the idle speed screws too after this.

You may have a to re-adjust this in the late fall and in the spring. (Fall and spring tune-ups was a common practice in this vintage of cars.)