Tell us a bit more about the g-forces and tires who allowed for such?
You didn't run on sliks, didn't you? But I believe there is some sticky rubber out there.
Is Thunderhill a banked race track? You do know that you have a little as 1 quart of
oil in the pan at high revs?
Even though you pump seems to have seized by the tappet piece you may look at TWO culprits. Starved pump first.