So, Update 2:
The bad ignition coil was replaced. I pulled the autolite plug from cylinder 3. Was clean as a whistle. I put the NGK plug in anyway, per recommendations.
Car started up fine, but idled up at 1500 rpms, and had a slight tick at around ~5 Hz, but on a friend with some experience’s recommendation, I drove it around for about 45 minutes on the highway.
Tick gone, misfire gone, idling at 600rpms, smooth, and check engine light off.
My friend thought he had a compression tester kit to bring with him, but he couldn’t find it. Is it very important to have that done still? I plan on replacing with the new NGK plugs within a week or so, per everyone’s recommendations, but can’t do that immediately.