I get my driving licence in about 2 months

An i'll take my bro's JettaC MK1. I have some Qs and i hope you can answer me
My father changed the engine ~7 years ago with an AUDI 1.4lt @85hp. From witch car did she came out? All i know about her is that she is 3 generations Younger from the car.
Right now it can reach max. 145kmph in straight line. I am fine with that i don't want it to go any faster (since 130 is the limit in most national roads in Greece) however i want better acceleration and torque because i use trailer for my summer camps

. How much costs a conversion to a 1.8lt engine?
Also, can i install A/C in this car, and bucket sits from a Mk5 GTi? they are pretty comfortable
Sorry for my english... Not that good

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Also any good website for parts? They are pretty uncommon here... (Greece)
Tnx!
