I know the Willys F Head motors have a hole in the connecting rods that sprays oil onto the underside of the piston and cylinder walls as do some diesels.You don't think pressurizing the oil system will help ? It will spray oil all over everything. Including the piston pins and rings and by extension the cylinder bores. As far as filling the whole engine with oil. All you will end up with is a mess. It will come out every pore that engine has, plus the seals. The seals are not meant to hold back a solid mass of oil. Also pouring oil in the combustion chamber will only work for a few days. Then the oil will drain down. If you want to know the "correct" way to seal an engine for long term storage, the military has an excellent program listed in one of the TM's. I cannot remember which one off the top of my head, though you could look it up. It involves totally "draining" all the oil though.
I don't believe the small block Chevys have that feature.
They rely on splash from the crank case and oil thrown out of the rod journals.
Either way, the piston and rod combo needs to be in the proper position for that oil hole in the connecting rod to spray the cylinder walls.
My understanding is that connecting rod bearings get variable oil pressure anyways due to the crossdrilling of the crankshaft journals needing to line up.
You would need to prime the oil pump WHILE rotating the assembly.
If you want to store an engine for years, install it in a vehicle and drive it once in a while or make it run on an engine stand.
Leaving a freshly rebuilt engine to sit; new rings against freshly honed cylinder walls, is asking for trouble.
Better to leave it in pieces and assemble it when needed.
Or break the rings in by operating it before storage.
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