Ok,
So can I turbo the engine?
If so,how do I go about doing this ?
If this is the current extent of your knowledge with regards turbocharging and general mechanics, I'd suggest you go to the library, use the internet and read as much as you on this topic can so you are more familiar with what's involved with turbocharging an engine. Then you will know why it's a bad idea to muck around doing trying it to an 18R-C.
If you want a turbo engine, buy one that is already equipped with one from the factory.It'll cheaper and much less painful -
Profit from thechuckster's experience and don't bother!