Hi ! I have a 1985 300 D turbo, but the engine is 1983. It have no place for RPM sensor on the back of the engine. Can I use the front sensor close to the pulley ?( I add the green & black wire ) . Of course I will buy from you the electronic part you have for sale .How can I test the signal from the cable? Cris , 8054559477. My email is coco_4449 @ yahoo.com. How can I order ?