Folks, I need some help. I've searched the forums for an answer to this question, but I haven't found an answer.

Finally started up my truck after many years of sitting, and it doesn't idle well at all. In fact, unless I choke it slightly, it will die. I've tried adjusting the mixture screw, but it doesn't seem to have an effect. Runs okay and doesn't miss when I give it throttle. It seems more like a fuel problem, although, I guess it could be ignition-related as well. It's got original ignition system components (plugs, wires, points, etc), but a new fuel pump and a carb kit as well.

Any help would be appreciated.