I'm planning on getting this done next year hopefully! It's pretty much a straight swap, you can use the 4efe ECU, using the 5efe ECU gives problems with immobiliser apparently..The only thing you need to swap around is the throttle position sensor I think..your best bet is to talk to the member "Project C.F.A", he did his 5efe conversion recently In regards to insurance, the 5efe is pretty much identical to the 4efe, bar the sticker on the rocker cover, so make of that what you will lol