Oil pressure warning sender.
After a recent sudden and massive oil leak, I no long trust hose and nipple fittings secured by hose clamps. Today I am getting Pirtek to make me some more secure connectors, but I also want to install a warning system to instantly tell me if oil pressure is dropping (it's easy to not notice a sudden change in the oil pressure gauge).
There seems to be a plugged forward-facing oil hole just around the corner from the oil filter assembly.
Its the ideal location for an oil pressure warning sender. What thread size is it?