I attempted to locate the oil pressure line this morning so that I could swap the original (Tudor guage) into the Smith's 3:1. I think that the original is located forward on the induction side of the engine. It has a pipe which runs to the back of the Tudor guage. The Smiths supplied transducer has just one terminal and looks to me as if it screws into the block in place of the original. Can anyone with this engine confirm this or tell me the correct procedure? Thankyou.