I am pretty sure that the 84 - 86 turbo manuel ECU's will work for those models and the 87-89 ECU's were diff. Make sure whether or not you have a cali or federal car! If you put the Cali ecu in a federal car your check engine light will stay on thats all. If its an auto car you have to get an auto ecu, manual dont matter you can run an auto ecu in a manual.