Why do I keep breaking rocker arms?

I'm still working on getting specs. It would probably help if I weren't mechanically illiterate:rolleyes:.
Here's a few more pics under the valve cover. Not sure why the're sideways, sorry. Valves are definitely not all at the same height but a lot of them are.

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Why is the adjuster for #2 intake so far out?
Oh, & the idea of a Slanty on the Rev Limiter has almost, (ALMOST) left Me speechless.