[pjmoreland]

Very interesting. Thanks for sharing your results. I have never seen the stock ammeter needle deflect as far as it did in your test in the three 67-72 trucks I've owned that had an ammeter. I've seen it deflect maybe half that far, max, and that was after doing something like performing a compression test where I was cranking the engine over a bunch, or after forgetting to turn off the headlights while inside a store for half an hour. I've always wondered how much the needle would have deflected in a new truck that had perfect wiring.