i am about to swap a USDM 99 (OBD2V1)ITR motor to my 00' (OBD2V2) nonVtec Automatic teg. i am just wondering if i can still reuse my ECU harness from my car or i have to swap the whole wiring thing... reason why i ask is coz OBD2V1 ECU is A,C,D plugs, my car came with plugs A,B,C,D (my car was auto ,now manual with GSR tran). so what does it mean? i know that OBD2V2 ECUs are running A,B,C plugs for manual one's and ABCD for auto one's.
any ideas?

thanks