So, the car drives wonderfully now. My first tank with the new O2 sensor I averaged almost 24mpg. Just doing a few odds and ends now. Primarily fixing rattles and other annoyances. The door latch linkages on the drivers side lost a bunch of the little grommets that prevent them from rattling in their locations. Not a big deal, but replacing them is a little fidgety because of the tight spaces inside the door. Also placed some foam tape on pieces in there out of adjustment or loose, like the aft window track. Not a huge project, bit the results are satisfying. Every little project like this just makes the car quieter and adds to the enjoyment.
I have been thinking about future maintenance and projects. I will probably address them as the prioritize themselves. I am starting to think about the AC system. It slowly loses its charge, so there has to be a leak somewhere. I did something similar with my NA, replacing the seals when I retrofitted it to R134a, so I am weighing that out and what to replace versus having a shop do it. Seals, drier, evaporator and a more efficient condenser may be just the ticket.
I am also considering some sound deadener on the floor, rear quarter panels and doors, just to hush the interior a little bit more.