If possible I would want a h22a4. I am wondering how easy is the swap with the a4. I am thinking of h22a1 if a4 is too much work. But if h22a4 is as simple as a1, then I would want a 5th gen into my prelude

Do I have to replace any other parts if I am going to do the swap? I am thinking of a change over so that I can replace all other faulty parts (like throttle body, etc).

Thanks!