Note taken. Put a load of 8.2Kr, 5W at the 160V rail, replaced those caps and gave it a go. Resistor R331 promptly melted.
After removing R323, R324, R325, R328, R329, R331, R332, C313, C330, C331, things stopped smoking. I can see that the 160V rail has 225V, even with the load connected. Also, +12V has 120V and -12V is on -110V.
I'm gonna investigate the 12V rail now, as it is the primary regulator.