92 jetta 1.8 SOHC questions

Im new to the whole volkswagen scene and I would like to do some work to my engine. I know that there are 1.8T's out there and also 2.0T's, would it be possible to get either of these engines and have it drop into my MKII without major mods? I was planning on getting a DOHC to turbo if possible since I figured the SOHC wouldnt be as good of a platform for a turbo. Any info would be helpful. Thanks.