Great points. Like I said in another post, these engines also seem somewhat prone to oil sludge by design judging by how many develop cold lifter tick over time. Hopefully modern synthetic oil, frequent oil changes, plenty of long trips, and a clean PCV valve prevents this from happening again once it's cleaned up.
Mechanically it still seems very healthy judging by the fact that it has 180-185 PSI on all cylinders, doesn't seem to burn any oil, runs and sounds great once warmed up, and has very minimal wear on the one rod bearing I checked while I had the oil pan off, so I don't think it's at much risk of dying any time soon.
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