Well, I'm not sure if I've made backwards progress or not, here...
Yesterday I picked up an ecu out of a 91 FWD, non eprom (but yes, turbo).
I also finished changing the fuel filter, and buttoned everything back up.
Went to fire it up, and it would seem I'm worse off than before. Car cranks but will not even catch now.
I don't have time to look at it today, but I will swap MY ecu back into the car and see if it'll try and catch, or if I've missed something in the engine bay.
The 91 ecu that I borrowed did look like it may have a bit of damage on it... I'll hopefully be able to look further into it on Monday.
*next day edit* Yep, my ecu still tries to start the car, almost catches. Other one does not - Injectors don't seem to fire, plugs are dry when I pull them. Back to the last step that I was at, seeing if another ecu will get me going.