The Legacy harness is out! It has a white block on the left side above the fusebox that holds a bunch of wiring; it has a spot built in already for the WRX SMJ already!
I always like to throw the dash bar back in so the steering column doesn't hang from the firewall.
Zoom in... the WRX ECU bracket and ECU bolt right into the Legacy chassis like they were meant to be there.
I also tossed in my WRX pedal covers for a little bling-bling. I put the whole WRX accelerator cable and pedal in, it fits perfectly. The cable is longer to reach the throttle actuator on the other side of the throttle body.
Engine bay with the relevant wiring removed. I'll be swapping the crossmember for a Turbo Legacy crossmember this week and cleaning everything up.
Right now the plan is to do the wiring merge this week, then a friend of mine will be coming over next weekend to help me put everything back together; hopefully my engine works and my wiring job is right!