I should also note that we’ve not had such extreme heat since it had the extreme misfire issue, so I’ve no way to verify if that part of the issue still exists.
I may just need to baby it for a few weeks to avoid popping a CEL, so I can get it through emissions, then start tackling it again. It I stay out of the throttle, it drives fine.
Thanks for all the input!

BMO, get a quick read from an OBD reader BEFORE you go get emissions testing done. IF there are any codes relating to emissions (even pending), you'll fail and have a short time to fix it. I had a car (OBD ready) that did not trip a CEL but did have codes (yellow light on reader) that would have failed the old SC state test. If the OBD reader was anything but green LED, it failed. Good luck!
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