Along the lines of small engines...
I have built a few Pontiac 2.5s - the Iron Duke - just for a laugh.
Installed Chevy 350 pistons (direct fit) balanced, big cam, large intake valves with porting, Mallory distributor wit an MSD box, headers, 390 4 barrel, custom fitted 6" Chevy I beam rods,
BUT - the one big difference - the Iron Duke is based on many GM parts that fit other engines.
The Tutu is not based on V8 parts, it's all metric Voodoo. So, in order to find different pistons that will withstand pressure... N/A - or custom made.
Chevy forged small block slugs go right into a Duke block with a Shite ton of different combinations of compression/stroke/bore. The big end of the 2.5 rods is 2.0 and... so is the early 327 and 283. The SBC rods are wider at the big end, so they have to be shaved, but that's easy.
The point I'm trying to make, while it is a ton of fun to make something puny go fast, the aftermarket support should be there, or you will empty your wallet pronto.
I have seen aftermarket turbo manifolds for the 2.2 on ebay, and "DIY" turbo pipe kits.
That's the easy part - sort of. Fabbing the correct fitting tubes and intercooler is the next trick.
The last an ultra important... tuning.
You HAVE to have a dyno (some will say a street tune is ok) but I completely disagree. The dyno will give you the most complete readings through the power band to re tune your fuel and ignition maps.
Ok, I'm sorry for the dissertation, but these are just a few of the considerations you will encounter.