Do any of the dash lights come on. Like a bulb check when you would normally start it with a key?

How many ignition keys did you get with the truck?

Try bending that cylinder looking thing (its the hood saftey switch) it should be parrallel with the ground when the hood is open. They have had many problems with those switchs so wiring in a new kind or new one might be in order.

Let me know what you find.
Kevin