Owen_Dyneto wrote:
Based on the oil pan, that engine has had lots of experiences; wonder what it would say if it could tell us?

For starters, drop the oil pan. Clean the oil pump intake screen. Pull at least a couple of main and rod bearing caps and check the bearing condition and clearances, and the crank journal condition (visual check). Pull the timing chain cover and check the condition of the timing chain and gears, replace the front seal. Sure, replacing the core plugs is a good idea.

If you haven't already done it, take a set of compression reading; first time dry, second time around after a couple of squirts of motor oil in each cylinder.

Remove both water jacket drain plugs and force-flush the cooking system.

Replace the water pump and fuel pump with rebuilt units.

Remove the valve covers and after a visual inspection, use a small and long cleaning rod and brush (such as one woulduse for a 22-caliber rifle) and clean both oil return drains from heads (at the rear) back down to the pan.

New motor mounts are available from Kanters, exact duplicate of originals and not expensive.