dude if you aint looking for mad power then leave the cossie engine. just buy a decent turbo and manifold,management,intercooler get the engine sump oil pipe etc etc etc done then have it mapped. car will be a pleasure to drive with the engine in it thats supposed to be in it in the first place.
personally why would you want to put a cossie engine in it when you could turbo the standard engine [ obviously if your after big power then built it and low comp it] and it would be better power wise because its a 2.5 so will boost quicker aswell. on low boost they still make decent power .