318 stalling from idle

Thank you everyone for all the advice so far! This is my first carb car, and since I obviously bought it used (I wish I'd bought it new, I'm sure it was cheaper in 1964), I have no idea what's been done to the motor, and more importantly, what's been done incorrectly. I really appreciate everyone weighing in with their thoughts, and I'll be sure to update the thread as I check things off the list. Merry Christmas to everyone!