Hi mate
Just thought I'd give some advice before you start stripping the engine out just in case you have never done a Subaru before,,, one thing that normally gets everyone when there doing this for the first time is separating the engine from gearbox ,, not having removed a NA engine I'm just assuming it's the same setup as a turbo,, they will not separate until, you have removed the the clutch fork pivot bar , you can also pull the fork out via the hole but this way is far easier ,,, beside the fork there should be a Allen head inspection plug (shouldn't miss it) remove this then get a threaded bolt (think its about 10mm) I normally remove one of the cam bet cover bolts and use that as its the right thread ,, thread this into the end of the clutch fork pivot bar inside the Allen hole and then pull to remove the hole bar and release the fork
If iv not explained it ok then just let me know and I'll try again or can take some pics of mine for you
