My son, Landen, and his grandparents my parents purchased a 93 Mazda RX7 in 2003. My son and his grandfather replaced the rotary engine with a LS1 5.3 GM Motor and a 4L60 automatic transmission. My son was killed 7 years ago and my father has had multiple strokes. The car has sat in a garage since my son's death. My son was always tweaking everything for the best performance. He could link his laptop up to the car and make adjustment to help performance . My son had the motor in a sling above the car at the time of his death. My uncle drove 300+ miles and put motor partially back in. There are a few things that need to be finished. I had my cousin look at the car and he is telling me I should buy a 99-02 4L60 wiring harness and reflashed computer with vats deleted and be sure the connections are red & blue. I can't find this. Can anyone guide me.