4 hours in the shop later, I have a tentative diagnosis. One of the ignition coils tests faulty. That would make sense- the power loss was more than just one cylinder would account for, and each coil controls two cylinders. Makes sense to me. However, I still need to tear down further and find out what that ticking noise is, so there will be more shop time tomorrow. Any suggestions for locating the ticking?

Also, anyone out there have a GenII parts car that I can steal an ignition coil from? I would be MUCH obliged as I cannot afford a new coil at all. I'll gladly pay something reasonable for the used part, but I can't pony up the $100+ from the stealership.

Thanks for all your help!