1990 metro ECM

Does anyone know the part number AND letter codes for a 1990 metro?

I'm thinking federal emissions with manual transmission. It's also a base model.

I have a mashup I'm trying to unmash. '97 body and what I believe is a '90 engine.

Found a ECM at the local pull and save. It's an A4. Now all I need is a wiring diagram for a '97 and a '90 and I can make Frankenmetro.