Will a prelude engine fit into my teg ? Or will I have to do modifications?
Search first. Im sure this has been asked a bajillion times. Actually, search next time - this time I will tell you since Im already typing. You can fit it with serious modification, but the weight makes it not worth it. Dont do it unless you REALLY know what your doing, and you dont - because you asked. 
try: :search:
there are a few other people asking the same thing with responses so you can also look at what they have to say to