It could be either the head gasket or the front cover again. I have read that the head gasket leading edge in the area in question can recede/deteriorate creating the leak described.

Oil pressure passage location is on the right rear of the head/block, not in the front.

It may be worth doing the front cover again and putting a very small amount of sealer on the leading edge of the head gasket, assemble everything and let the sealant dry for a couple of days if you can.

Good luck!!!

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