If it has 4 02's it's a LEV tune. The secondary 02's (the 02's that pass through the trunk floor) can be safety wired under the car in fresh air or the ROW tune can be pushed to it and remove them from the system (we save them for spares)
I'd be interested to see a picture of your engine compartment!!
Someday in the near future I'll buy a RHD dash and build one for the USA
B