I just Got a JDM GSR automatic ENGINE to put on my manual LS body. Both the car and engine are OBD2. But the question i have is, people say i need the vtech harness and some people say I dont need the wiring harness. I just need a straight answer cus theres about 4 wires on the engine that my car dosent seem to have. Maybe its because it was a auto engine, or maybe because its JDM. I just need help wiring this engine, and maybe any other helpful tips making this a sucessful swap.