Nope
No they fit different, although mk2 and mk3 and some mk4 polo gearboxes will fit. You want an 8P gearbox.
Yes, I have it done on mine. The MK3 2.0 gearbox fails when it gets to high mileage. The Mk2 1.8 gearbox is bulletproof.
yes...but you have to change and modify a few engine mounts and so on. And modify or change the whole el-wiring in the car
12
yes they will
Yes
Yes, with a few caveats. The 1.8 20 valve turbo from the mk4 Golf is a very popular choice for engine transplants and will fit all Golfs including mk2 and mk3 models. Various VW/VAG forums have a wealth of information on this subject. SD
no i dont think it will they are totally different shape
it will plug straight in as i done it with my mk2 golf and it plugged straight in and worked and my mate done it with his mk3 there will be wires for it i hope this helps
No
did you use the ecu that was with the new engine as the engine setup would have been different.