yeah that pretty much what im going to try. read a few builds now of people just adapting the 4efe loom to take whats needed. this way round you don't need to touch the interior. heres a little gem i found on another page.. This seems like a daunting task, it really does, but some things I did for my conversion using an EP82 loom/engine/ECU which may help you are... - Try to use as much of the EP91 loom as you can, all you should end up doing is chopping a few connectors (because they don't fit on the EP82 engine) and running a few extra wires to the ECU - Try to use your EP91 altenator, air conditioning and starter motor. Yes, they fit fine. If you already have power steering then happy days, but if not you can add the EP82 gear no worries. - Depending on the EP82 year model the general wiring differences are: - The temp sensor plugs, the EP91 has 3 wires on a single plug, the EP82 has 3 plugs. 1 Wire is for the temp guage on the dash, one goes to the HVAC module (which apparently the EP91 doesn't have!) and one goes to the ECU. - The oxygen sensor is a single wire on the EP82, the EP91 is a 3 wire so you'll need to swap that out, the 2 extra wires on the EP91 are not used at all on the EP82 - You don't have a knock sensor on the EP91 so you'll have to run that wire from the ECU to the knock sensor - The idle ups are same but different (EP82 has 2 idle ups for A/C/electrical load maybe?). On the EP91 you have a single idle up with 2 coloured wires (one is not an earth) whereas the EP82 has 2 idle ups, both have a single coloured wire and a shared earth. - One thing that caught us out was the MAP sensor. It seems the EP91 signal wire is shared in the loom somewhere, so we have to run a new wire for it. - TPS plug should be the same, the difference is the pinout on the ECU - Biggest hassle was sorting out the ignition system, it's not that bad really but it is quite different. - Even though they look the same, the EP91 loom ECU connectors are slightly different shapes to the EP82, same number of pins but the actual plug points are different size. What you can do is get a hair clip and pop the wires out of the plugs, so i would really suggest using the EP82 ECU connectors I kept my A/C and also converted the EP82 power steering into my car, all that is left on my car is the idle up wiring, I can't find where the wires run from... at the same time i haven't really bothered to fix it just yet.