How bad are the vibrations during WOT - too much shaking of a harddrive will cause a BSD. Vibrations could also cause your memory or any IC socketed chips to creep which would cause a BSD.
Have you done the "Big Three" wiring upgrade for your engine compartment. I've never heard of WOT causing a loss of power, but if WOT is causing a bad ground you'll get a BSD from the loss of current. If the power supply is any good there should be no such thing as too much voltage. I'll let someone else chime in on diagnosing the power supply going bad.