My wife drives a '96 Legacy 2.2 Auto (AWD) and I have a WRX Wagon. I'm thinking about doing an STi motor/tranny and putting my current drivetrain (or at least the motor) into her car. I know I need a new hood (the one with a scoop), but am wondering what other things will need to be changed. Here's a list I anticipate off the top of my head:

-fuel pump
-maybe a crossmember modification for the Turbo exhaust
-brakes (My stock WRX brakes)
-drive shaft and maybe half-shafts too
-hubs for the driveshafts if necessary
-wiring (probably a big pain too)