nope the engine managment is totally different for the 8v, you might be better off converting to 1.8 16v K-Jet managment, quite a bit cheaper and much more simple. You'll need:
ISV + loom + ISV controller
ECU + loom
Injectors (buy new brass mercedes ones from ebay, £50)
WUR
Inlet manifold + 5th injector
Fuel lines
Metering head