Its a gamble for any of the 90-94 turbo ecus to be the eprom. 90’s are about a 50% chance. Plus all the turbo ecus are the same depending on transmission or fed/cali emission.
Heres a list of ecm part numbers so no one screws and gives ya a n/t ecu. http://simon.chi.il.us/ECU/ECUID.html
I have a m/t fed fwd turbo 90 ecu.