Thanks again, Art. Got the way better wiring diagrams from the source you mentioned and got a proper LED circuit tester, with which I was about to start with the spark tests in your photo today. (Delayed by a trip to Yosemite over the weekend)

As I began, I remembered not having found battery voltage w/ or w/o ignition on, at the ign. coil -- not to mention not having seen any spark from a grounded, pulled spark plug when cranking.

Suspecting the Coil's #15 BLU wire to the ignition switch, I pulled on it, and it came out in my hands along with one of the RED-WHT wires. Poking inside the shock tower I found the beginnings of a mouse nest. some wood fibers for nest material plus a bunch of wire segments. The silly little mice had bitten through the heavy wire cover, cut a number of wires, disabling the car. I've cut the damaged bundle, pulled it out, labeled the matching wires, and will now reconnect everything.

Any suggestions on getting the mice to stay away? Poison? Mothballs? Camphor Oil?