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If you read the manual you will see there are timing marks on the too plate of the timing belt cover and flywheel. Once you find TDC you can just line up the marks. The tool you are after was made by Mercotronic. It is nothing more than a dial indicator that threads into a spark plug hole. It’s a great tool especially if you want to advance the timing a bit.
Thanks for the help. I THINK I see a mark on the flywheel… it’s not in the best of shape. I’m hoping it will be more clear when I get it pulled and cleaned up. Haven’t pulled the mag pulley yet either. I will go over the manual again, but I was under the impression that this tool was recommended for setting the timing advance stops. Another question I have….. Surely the flywheel is keyed… Is it not?