When I purchased my 83 280zx turbo donor car I never had the impression that the guy did this swap already, he didn't even tell me at the time all he handed me was a 240sx TB with the adaptor plate, a stock 83 280zx turbo ecu, manual boost control, a BOV with adaptor still didn't know any of this info now reading this helped me out a bit, the car
ran fine with no problems traveling over 300 miles, but when we pulled the motor out to swap it into my 81 280zx non turbo the ecu was the only thing giving the problem, looking at the 83 280zx wiring diagram (not knowing that it already had the 87 ecu & MAF) , but I googled the ecu and it came to be the 87 ecu lol.