There are a lot of threads around here on this topic, I suggest you use the forum search. Short version:
Easiest - Swap the car for one with a turbo from the beginning
Less easy - full engine swap - including plumbing, turbo, harness & ECU
Masochistic - any other route
Easiest - Swap the car for one with a turbo from the beginning
Less easy - full engine swap - including plumbing, turbo, harness & ECU
Masochistic - any other route