Won't stay started
I have a 1968 International Pickup it was running just fine yesterday and when I turned it off but something happened I'm not sure what. It will not start it does have spark and it does have gasoline. When I turn the key to start it the engine will start and run as long as the key is in the cranking position. But as soon as I return the key to the running position the engine dies. I replaced the ignition switch but that does no good. Can somebody please help me with this problem?