Last night I put the engine on a stand and pulled the pan. I wanted to just have a look at the innards to see if there was anything obviously wrong, but this engine appears to have been rebuilt sometime not that many miles ago. While the outside of the engine is sort of dirty, the inside is super clean.
The plan now is to put it back on the table with the transmission attached, verify timing, torques for the pulleys, and hook up battery and fuel to see if I can get it to fire up.
Here are some photos:
