Why does your 1965 Plymouth Fury with a 318 and 2 barrel carb stall out when put in gear and will only idle briefly?

Your 1965 Plymouth Fury may stall when put in gear due to a few potential issues. Common causes include a vacuum leak, which can affect air-fuel mixture, or a malfunctioning carburetor that isn't providing the right mixture for power under load. Additionally, the ignition system could be failing to deliver adequate spark when the engine is under stress. Checking the carburetor settings, ignition components, and vacuum lines can help diagnose the problem.