A full obd2 upgrade is a little tricky, wiring looms need chopping, MAF, lambda, throttle body, manifold, immobiliser all needs tweaking.
I've done this on mine with just the 2.9 lump, well worth doing! Or, you can just swap your "core" engine, essentially all 2.8 obd1 and obd2 engines are the same, it's just the sensors and management that differs.
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