Like I said. I saw the same things before on my own engine. You have cracked ring lands on those pistons most likely.

Actually, there is hope. If you pull the engine and find that the cylinders are not scratched then you can get pistons installed, probably someone has pistons from another SVT that fried, ones that were in good cylinders. I'm sure they'd just give them to you for the cost of shipping, I know I would if I had them.
If the block is thrashed, there are several SVT blocks floating around that wouldn't be that bad to get hold, unless you want to do a 3L job on it. You did say the car was in great shape right?

Former owner of '99 CSVT - Silver #222/2760 356/334 wHP/TQ at 10psi on pump gas! See My Mods '05 Volvo S40 Turbo 5 AWD with 6spd, Passion Red '06 Mazda5 Touring, 5spd,MTX, Black