At that particular track day, I was trying to keep it in the torque curve, so shifting at 6krpm. I did possibly over-rev it on one lap when I was focused on traffic, probably when the springs went. The head was pretty noisy before the track day, was recommended to get the cam shims replaced so the cams may have been stuffed before the track day. But at the end of the day, starvation may have just tipped the whole package over the edge.
Thoughts on tackling oil issues are:
Custom baffled sump
Accusump
Proper monitoring of oil pressure
Better oil pump and breather configuration.
Will tackle at least the last two. The oil cooler setup should make accusump a pretty easy install, will see how much cash is leftover once the engine is done.
Thanks for the kind words guys, im trying to be optimistic about the engine rebuild. Pretty excited too.