If I were looking for a keeper, I think I'd be looking more at outcomes than I would visible component specs.
While everything you've listed is readily observable, there are sub rosa factors that arguably matter more, things like the alloys used in the many parts, avoiding hot or cold spots in the engine, providing adequate oil flow to all areas as needed as well as ensuring that oil can drain freely from all areas. There also the simple matter of the overall quality of the engineering in design and construction of the vehicle, which you can't see.
I don't mean to tell you what you're really looking for, but what you're really looking for is long-term low-cost durability and reliability along with ease of repair as needed. I think this is what you intended in creating your well though out list, but I think that most of us could come up with examples that check all of your boxes that would be anything but good propositions for long-term ownership.
Maybe focus more on reliability and durability and less on specs?