where is the oil pressure unit located

The sending unit/switch is located at the rear of the engine--drivers side top of the block at the edge of the intake manifold. Its a bit difficult to get to with the engine in the car but can be done. If you need to change the sending unit you will need a 1/2" crows foot wrench to enable you to unscrew the sending unit after using a 7/16" wrench to remove the oil pressure sending tube or wire as vetts had two types of sending units. If its the wire type just be sure and not let the wire fall down behind the engine--if that happens its tuff to retrive. I tie a string around the wire using a loop knot. Saves lots of bad words and high frustration. jerry