!Removed! easy, fold down rear seat, may need to remove it in saloon, lift out carpet, locate hatch remove, three screws, lift of inspection hatch to reveal top of pump housing,
Remove fuel filler cap, turn ignition on and then unplug the electrical connector from top of tank, it will stall but don't worry that's the idea, 90% of pressure will be released.
Disconnect the two breather hoses on the left, shouldn't be any leakage,
Grab a load of rags and get ready, next undo the large fuel line with the white housing and there should be some residual fuel leak out.
Clean hatch if the excess petrol hasn't already done it for you
Undo the eight 8mm bolts and lift the lid out, you'll need to turn it through 90° to get the pump and sender unit out then catch the fuel coming out.
Take old pump out replace then do reverse of what you've just done, DON'T over tighten the tank nuts, if you shear one your !Removed!. Jsut hand tighten in a criss cross pattern then once your happy nip up a quatre turn plug all back in and turn ignition to the aux position and off again a couple of times to prime tank.
Have a look at savages build thread
http://uk.subaruownersclub.com/forums/index.php?/topic/3094-a-few-pics-of-my-project-so-far
or my pic thread for some pics
http://uk.subaruownersclub.com/forums/index.php?/topic/9698-my-foz