the D to D will be/should be an easy swap. if its just the engine for engine then I will not take long and the harness will stay in. Very straight forward

The other is a little bit more difficult and time consuming. <<Not that it's very difficult but you might need somemore tools to complete the swap. As suggested>make sure you have all the extras you will need before you attempt it. (rear mount from 99-00 or CRV 94-00, various hoses, etc...) TIME: If your doing it yourself I hope your not on the time budget .