[Ieatcamaros]

My first guess is the ignition switch. The last time I had crazy things happen in my stang, it turned out to be the ignition switch. It was barely making contact in the "on" position. If I held my fingers on the ears around the key it would stay running, but as soon as I let off the ears, it would die. The only thing that gets me in your situation is the idle surging. I don't know if that's the beginning of your problem or pure coincidence.