WELL DONE!!!! I love it, another Pontiac is alive. Any oil smoke? No expensive noises? Yes, that method is great for finding TDC but it does not time the engine. Do you have a vacuum gauge? Some use that to set the timing for the most vacuum at idle. But you really should get a timing light. Snoop around on Fleabay, they are not expensive. Just be sure to get an inductive one. The old ones with the spring on the plug are too easy to get bit. The inductive pickup just clamps around the wire and you stay safe. Timing is OK to be off a little at idle, but at speed, under power, you can really ruin your engine if the timing is not set right.