well u wont need to change the fuel as on corrado it has a shit fuel system that works by, air open up a flap and the more the flap is opened the more fuel runs through the nozzles. Also know as mechanical injection.
I see you live in london, if your around on sunday pop up to royal park for 1pm or on tuesday at ACE cafe at 7pm and ill be there and talk you though a few things
alex
2.1 16v