Fireguy - go back to basics. Did you prime the truck when you tried to start it? If the glow plug glows brightly and there aren't any obvious air or fuel leaks then check fuel. Take the line off of the carb and put your finger over the exhaust and pull the truck a few times and check for flow or bubbles. Glow plugs can glow and not be hot enough, try another higher rated battery or borrow one from someone that has a rechargeable.
If you have been trying to fire it up and fuel has been getting in the engine you should be doing an after-run oiling. Its not just for when the truck runs.
Good advice is to make sure the piston is at the bottom of its stroke when not in use. You can feel when the piston is not near or at the top of the stroke easily by turning the flywheel. Even better advice is to put it at the bottom before the engine cools when you stop running.