hi mate and welcome to the forum
the coversion you talk about can be done but i think its a big job. It would be a dame sight easier to change your bottom end, ie
2.0 bottom end in place of you're 1.8 8v, to get the same performance gains, but then again if its all free then why not. Of the top
of my head i think you will need the engine, gearbox, ecu, wiring loom but i'm not to sure what work is involved in the exhaust
system.
I'm sure the other guys will give you some good pointers