Good to know on the plug color. They are not glassy or blistered. They are just white, so my burnt valve fears are somewhat cured.
I will go over the timing for sure, but I want to be sure that I understand which method fits your analogy - setting advance with the best vacuum is a good method and checking for pinging then backing off is the chalk & axe method, correct? I read about disconnecting the vacuum advance and plugging that port, then connecting the vacuum gage to the manifold port (the one used for wipers), holding the revs at 2000 and then dialing in the best vacuum.
Thanks,
Mark