Update.....
After a long conversation with Becky and Glenn at Carnetix today and ultimately with Liz

going ahead with rebuild of sorts.
We talked options and power upgrades

but as I was reminded again why I bought the car I wont be chasing figures but I do want to get to as near factory spec or a bit more which after researching is supposed to be around 280?
Heads and block being skimmed this week ready for head gaskets. New bearings ordered.
Rods,crank and pistons are all ok and pistons confirmed `forged`(thanks Dave and Scott).
Clutch and cambelt all good. Manifold being shot blasted and repainted.
New MOT as due. Glenn said "It`s a nice wagon, getting rarer being an sti so worth doing in his opinion" and we agree

Just need to find the funds,kidney anyone?