i have a my99 sti motor/tranny ecu, wiring loom, rear diff, etc. etc. etc. for sale for 7K
lol..just a plug..
actually i beielve the version 2 is for that year. From my findings stray away from version 2 or 1. version 3 and 4 are the best bet for building up good motors. The version 1 and 2 are good old boat anchors.
scoobynet and see their opinions..they will know for sure..they get the freaking cars