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Finally got my crank pulley installed along with a new bolt, the old one was beginning to wear our and wobble pretty bad - i was beyond concerned that the woodruff key was worn out and causing the wobble, but it turns out that it is in good nick - the edges had slight wearing on them, nothing concerning so i ended up finishing it off.
It was fairly straight forward, because i have a 40mm Fenix radiator, the rad is set back too far and getting a socket on the breaker bar was impossibru!!! so the fans came out which involved removing both top rad mounts so that the coolant overflow and PS lines could move around a little more when pulling the fans out. there are 4 bolts holding the fans in from the top, then i had to loosen the 4 bolts from the lower rad area - the fans are separate and once the top bolts are out, they move back and slide up by pulling up. We ended up using a 22mm socket on a breaker bar with cheater bar on top - 5th gear and brakes. i was concerned when we were getting the bolt out as the pulley was spinning back a tiny bit but also seemed to flex??? anyway came lose and out. When installing the new one we lined the keyway up and pushed on. The new bolt needs to be done up to 33ft lbs as a first stage and then finished at 132ft lbs. be sure to coat the bolt threads in oil as per subaru specs - best to get a new bolt anyway as they were cheap as! i picked mine up from bunnings ... kidding, subaru genuine 
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Installation was reversed and all complete without wobble
if you need any tips for installation let me know. heaps of pics below.
been posting from both hahah whoops 
forking mint! 
