cylinder head gasket, searching advice

Very simple, make up a simple oil pre-luber.
Get a garden sprayer, remove and discard the lance, buy some brass threaded fittings that match the thread of your oil pressure sender and fit to the hose on the garden sprayer.
Put a couple of litres of engine oil in the sprayer, connect to oil pressure sender thread, pressurise and wait. The typical garden sprayer will proivde around 15psi of pressure, enought to slowly push oil throughout the engine. Once you' ve pushed a couple of litres of oil through there will be sufficient oil in the bearings etc to prevent a dry startup.
I use this on all my engine builds.

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