I ended up fixing the radiator last weekend. First attempt I trying epoxy and fiberglass - this didn't last a mile. Next I tried an epoxy putty, steelstik, which has been holding for 20+ miles.
I tried to get the car smogged after the radiator repair. But we couldn't get the smog check gear to work. The electrical problem caused issues with the smog check station inductance RPM meter (need to measure RPMs during the smog check or something).
So now I'm working on tracking down the electrical problem. I've started a thread about tracking down the electrical problem here:
http://www.subaru-svx.net/forum/showthread.php?t=64528
I'll update this thread as I get this SVX back on the road. I'm super happy to snag such a low mileage and straight bodied SVX (bonus that it's the same color as my first SVX).