Rob,
Something I stole from another forum....
When you crack open your rocker covers, take a good look at your camshaft lobes. Mine was pretty ugly. At the time, my car had 200,000 miles on it so I just put on the new rockers, buttoned it up and crossed my fingers. The goal is to make 300,000 and I'm halfway there. The engine still ticks though but at this point, I don't care anymore. It runs GOOD!