Just surfing the 'net and came across this diary (with pics) of someone's obsession with a unique 323 rebuild using a turbocharger from a WRX. I especially liked these parts:
"***I should point out here, just to remove any ambiguity, that this car no longer has any petrol system of any sort in it. It runs purely on LPG. The computer, fuel injectors, air flow meter, petrol tank, fuel pump etc are all gone. The LPG is metered via a GRA LPG carburettor/throttle body measuring 3".***
"I had to drive to the exhaust shop with this pipe only. She sure was loud and the turbine whine was incredible. I had people looking around left and right! "
Check it out at the following link.