GMC53,

I might have misread your above post, but didn't you indicate you loosened the fuel line INTO the carburetor, and no gas came out!

This means no fuel is reaching the carburetor from the fuel pump/fuel tank..this could be no fuel in the tank, a blocked line from the tank, a defective fuel pump or a plugged line from the pump to the carb.

Before you beat yourself up over a funky carb rebuild, get fuel up to it! Work your way back until you find fuel.

Several recent posts on this same subject have come up with a plugged fitting at the tank, and a empty fuel tank.

Be sure to check your fuel filter/filters if you have them.

Stuart