it's extreamly time consuming, plan on pulling the motor & spending countless houres sitting in your engine bay. It can be very frustrating tracking down some of the stuff that you will wanna use as far as connectors & stuff. Brake lines can be a pain when relocating them to inside the firewall. Many spend hours extending the wires so that they can travel a longer hidden route through the frame rails so that they won't be seen in the engine bay.

Heres a whole thread about it:
http://honda-tech.com/zerothread/1043518