Sounds like you need to have this thread moved to the Engine Shop section...you'll get better help there with your carb and vacuum leak issues.
Was this a running/driving truck before you started having issues or are you bringing something back to life after a long nap?
Do you have a vacuum shift 2-speed rear and does it work?
Disconnect the big vacuum line off the back of the intake that goes to the firewall and plug it at the manifold (it serves the Hydrovac and rear 2-speed)..did that help any?
Others will chime in with more/better ideas to try...
Mike B
