We left this a year ago having just having scraped a test because of a very tired exhaust that had been heat cycled and removed several times.
Since then it's had, in order:
1. A nearly-new ally Koyorad radiator with an uprated cooler (because the old one, complete with cooler, was dying and the gearbox place insisted it was fine). I may yet have another external cooler fitted.
2.The box repositioned (it was put back in crooked, banged against the body under load and strained the prop UJs)
3. A new bottom hose (old item was replaced finger tight, blew off and nearly cooked the engine which was filled with OAT rather than blue glycol)
4. A new lambda sensor (ECU was throwing up an error code when the CHECK ENGINE flashes were read, despite not being displayed)
5. Two new coil packs (running rough across both banks with one pot down each side). Power has been fully restored despite the best efforts of the gearbox.
6. A replacement speedo cluster known to be working (the original began reading half true, I suspected one of the two VSS units had died but tests by a specialist traced it to the dial pack. Another garage suggested I use a GPS speed app on my phone; the gearbox specialist has used a JDM 4EAT case for the box replacement and JDM Alcyones/Legacys/Imprezas use an external VSS screwed into the front diff housing - they'd left it in unconnected as UK cars read speed from the back axle)
7. New speakers all round (the original rear 6x9s had rotted and were full of insect dung). Wiring adaptors and front speaker mounts purchased from the US so the dead moulded items could be replaced with aftermarket units attached by adaptors to the original wiring). Unfortunately the infamous sleeve lock regulator which tensions the window cable, broke in half - so the drivers' window doesn't go down any more. 3D printed copies are available and I've ordered a pair from the US.
8. JDM transmission tunnel carpet (located randomly by an SVX NATION member who realised he had it lying around).
9. Rear discs treated chemically to stop them grinding (only part successful, one is still vocal). There's an occasional groan from the rear diff which indicates new fluid and an inspection is needed. I suspect I'll end up having to buy new discs and they're made of unobtanium; most parts list insist that SVXs use 260mm solid rotors when they actually use 290mm vented items. Subaru used the same PCD/offset rotor on the 2004-2005 Group N Impreza STi 'gravel' rally car so you can get new discs, albeit at a price. Front discs and pads all round are still readily available.
I've still got to take the CD autochanger out; I listen to music via the CD IN on the headunit via a bluetooth adaptor and the 'changer doesn't work anyway. I'd rather have a flat boot floor in preference to a bricked autochanger further wrecked by the PO fitting a 6 disc magazine to a 10 disc unit after he took said mag for another car and shoved a similar but incompatible 6 disc cart in for some baffling and unknown reason.
10. It still needs an exhaust, the new aerial fitting and the buzz from the rear speaker shelf (fitted from a scrap car as the PO took it out and didn't replace it) sorted, along with the dead bonnet struts, a new plenum cover and a battery bracket. Oh, and a rear plastic seat back, as I still can't find one. The PO left a hideous alcantara thing in its place.
Much of this couldn't have been done without the help of a very good specialist 30 miles away which actually bothered to diagnose faults and take time with it; it even has a set of workshop manuals which are rarer that rocking horse unicorn dung. It may still have problems but it's now a running, functioning vehicle - something you really couldn't have called it before.