hello mate! i got my96 too and the ecu is in the passenger footwell, take off the trim along the sill and inside, pull back the carpet, you see a plate take that off and you see the ecu, 3 bolts unplug away you go.
your vin plate is also passenger side near the strut in engine bay, this tells you what engine, gear box, shape, colour of trim ect,
codes
and a conversion chart
here!
good luck