Hey I got a 1997 BMW E36 328is and im about to get the Fuel tech 450 EFI system. It is a digital dash and ecu. Im wondering if I need a new engine harness to connect to the new dash. On the website it gives options on what harness to buy and They are really pricy. Does anyone know if I can just use the oem harness instead of buying a new one. I asked the guy that works there he said "to be able to use the OEM harness, you'd have to search the OEM ECU pinout and cross reference it with the FT450 pinout and make a "mini harness" from the OEM ECU connector to the FT450." does anyone know if the oem harness works?

https://www.fueltech.net/collections/ecus/products/ft450-efi-system