Just picked up a 2004 RX-8 :)

[reddozen]

That's cool. OBD2 plug in is always nice.

I finially found it...

Well I'm using a standalone Haltech E8. The wiring stays the same, leave the stock harness where it is(I removed unnecessary plugs such as injectors, ignition, and some electronic valves). I used the stock tps signal (RX8) and attached it to the Haltech. You can use any front cover you want, but you need to mount the stock trigger wheel and it's sensor (RX8) to have the power steering work and the stock tachometer.

I'd imagine with the stock 8 computer, tps, trigger wheel and trigger sensor, and conversion subframe, the rest of the swap would be pretty straight forward in relation to a standalone ECU swap. Then use something like the access port or mazdaedit to blank out the engine codes. I don't think the factory twins fit though.

Would love to do that to the 8, but I have to put that car to bed... The FC has sat long enough.