If you dont have the oil pump and sensor, dont go down this road. Take a normal 36-1 trigger wheel and mount on the belt pulley and then mount a sensor to read it. It is faster, cheaper and more easy to do. I only tried this because i wanted a 100% standard toyota system. After I mounted it, I found out that many ECU can't work with this set up. There are some guys here at UKSO that already have done a normal 36-1 wheel conversion.