In a case of engines like described above, I would first pull the pan and clean it. While there I would remove s rod bearing or two and a main and check for acid damage from sitting. We have lost bearings because we did not do that. Bearing coatings chip off and overlap causing clearance loss and resulting failure. Replace the bearings if needed, the pan, fill with good oil. I would then remove the plugs, run a compression check to see what the health of the top end is. If at least acceptable compression pressures I then spin the motor with the plugs out with the starter of if it can be done by pulling the vehicle in gear until oil pressure comes up. With the plugs out there is very little stress on the bearings and as opposed to pressure pre-lube only to the oil gallery the spinning crank will throw oil onto the cam which is also dry and will not be lubed by the pressure pre-lube. The cam will not have the pressure on it of trying to open valves in a running motor when still dry. There can be differences initially beyond what one normally wants to see in compression pressures but at least if it shows the valves are moving then many times valves will free up on the stems and seal better as the engine is run. A second compression check after the engine has warmed up well and run for a while will verify they are getting better or reveal if the head should come off.
