@pete roper
What's your opinion on main and rod bearings, with ~67k miles showing? Oil pan had a light coat of the brownies, but been sitting a decade- oil filter shows '09 install date so maybe quite longer, nobody is certain. The owner took pretty good care of it, oil changes balance TBs etc. Used Mobil 1 throughout, he said.
My inclination is to install a Valtec tensioner, button it up and run it unless a leakdown shows that it needs heads.