You’ve reached the stage of troubleshooting where I would start hitting the motor with a hammer. But just to save other people time… you said that the truck starts, but in your last post “still no starting”. Safe to assume you can still start it with choke?
Since it’s been sitting I’d think about sediment in the fuel filter or carb. All would be a fuel delivery issue. The one thing I haven’t seen you write is whether or not you can keep it running by adding throttle? If it’s just dying at idle maybe you simply need to redo your idle mixture. But...
Stalls even with the choke engaged and trying the throttle? Is it backfiring or stumbling, or does it just stall like it's short on fuel? Fuel showing halfway up the window is where it's supposed to be, so gas is getting to the carb. Perhaps some of the passageways in the carb are clogged. If it...