Car stalling at idle after topping it off.

Are we workin on a Chevy? Ford? Mopar? AMC? Lawnmower? Can you throw us a bone maybe with some details, too? Year, make, model, engine, carburetor and any other details?
1967 Dodge Dart GT. 273 v8 2barrel carb. Some extra details: as this is my first car. when I first got it it had a similar stalling issue. So I tried my best to adjust timing and idle mixture screws unsure if I did it perfectly. But it did stop it from stalling ever again. This was two years ago not sure if it matters now.