where is the oil pressure line to install a oil pressure gauge on my L36 whit pict if possible thank you

The oil pressure sender is located on the oil filter adapter..if applicable. If you don't have one..there may not be a hole in the adapter for one. The way I would check is to get under the car for an oil change and look over the filter adapter on the passenger side rear of the engine. Another good vantage point is to remove the passenger tire and look in from the side.

thank bill i will look at that because oil pressure is the only thing my aeroforce gauge wont scan

Actually..it can. If you get a pressure sender and figure out the analog calculation needed to give you the right pressure reading.