s2000 engine in civic?

well i did research it...thats how i know that the b18c or c5 would fit with ease....but my subframe was built to handle the hp of my engine....so i would try and get the whole front clip from either car since the integra subframe bolts directly inplace of mine and there is around 12 plugs or so and that meens less hassle with pulling the engine out and dropping another in.....just jack up the front end...drop the subframe motor and all then replace it withe the new one......2 days work max...i've talked to my friends dad who is in R&D at honda and knows about everything there is to know about hondas....but i just saw the s2000 engine and didnt know it was rwd....so as soon as i found that out i scraped that idea.....

why wouldnt a b18c5 be a good choice...other than there suposedly illegal to have in a street car