Ford EEC IV Computers

[Tony]

Does anyone know if all EEC IV computers as fitted to Ford vehicles are the
same (interchangeable)?
Do they all have the same part number?
Do they have different part numbers for different vehicles?

I believe mine might be faulty and as my model of vehicle (1986 5.0 litre
F150) is uncommon in Australia, I would like to know whether or not I can
just take one from another Ford that uses an EEC IV.

Thanks in advance,
Tony