on the top of my block at the back where the intake stops there is a black tubelike plug that screws in the block...looks like oil goes to it but it has a wire plug on the other end ..my question is what is that? i broke mine pulling the engine and need to know what it is ...does anyone have a blue print on the engine .....any help is appreciated

 

oil pressure sensor/sender
from shoebox's site

 

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