This is a new one for me.
69 GT500, with ALL new, rebuilt or fully restored components.
Finally got the car running for the first time in over 19 years. The problem occurred that after starting the engine, timing it and setting the fuel mixture, when I went to shut off the engine (with the key), the car continued to run at idle speed. Moved the key from run, to off, to acc, back to off - no change - it continued to run. I had to disconnect the battery to shut it off. And I am not talking the dieseling/run on effect for when a motor is refusing to shut off. It is running and will accelerate with the key off. Thoughts/suggestions on where to start troubleshooting.