Broken 440 rocker shaft, anyone else?

Last Sunday coming home from the track I lost oil pressure a few blocks from home. This is what I found. Anyone else ever see this? Last December I had an issue with broken spring retainers. The build had 13,000 miles on it, mild build to 6 pack specs, compression and duration of the cam but 570 lift. I lost the cam card so from what I can remember is it was a cheater type solid roller I bought used.

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