Engine is losing oil pressure at idle when operating temperature is reached. I’m reading 8psi with a mechanical gauge at the engine oil pressure sender. 8psi at idle, 38psi at 2000 RPM, 60 psi at 5000RPM. The gallery gaskets, oil sender, oil pump and water pump have been replaced already. The engine also overheats after a while, I’d say 20 mins of idling. I’ve yet to confirm head gasket leaks with the combustion fluid tool. Just reaching for some direction here. I’ve got many diagnostic tools and am mechanically able to perform repairs. Trying to see if there’s trends or common fixes.