Why do I keep breaking rocker arms?

At the moment I'm just enjoying having the car back and am daily driving it (you know those 40 mile scenic routes to the grocery store). I'm carefully watching the tach, shifting at 3000-3500, waiting for the next broken rocker I guess. I'm a little obsessed with how loud the rockers are under the valve cover and am always visualizing them just getting ripped apart by too long pushrods but I have no sane reason or enough knowlege to back this up. Can anyone tell me how to post a video here of the rockers in action/engine sound like Rusty's YouTube video?
Would you like a video of mine under the hood so you can compare engine noise?