Hey Guys, I think I've read just about every single online resource about broken rocker arms in SBC 350's today, but I haven't come across someone in quite my same situation. I figured I ought to tap the Nasty Z28 knowledge base on this one for some input: I was driving today and suddenly started hearing a loud mechanical pinging sound from under the hood, and it started driving a bit rough. I pulled over, removed the air filter and started it again. The engine was backfiring through the carb and still making that metal pinging sound, so I got a flatbed home. When I got home I took the valve covers off and discovered the the rear drivers side exhaust valve rocker arm had cracked at the pushrod seat causing the roller end to slip off of the spring, and the pushrod was loose. I was able to turn the rocker arm and pull out the pushrod without actually loosening the rocker arm at all. The unique part about this situation is that the pushrod is still 100% straight, I rolled it on my glass coffee table and it's perfect, so I don't think that the valve has come in contact with the piston... thank god... So to my question... is it possible, and have any of you experienced a rocker arm just cracking on its own accord? I'm going to have my engine guru do a leak down test to make sure the piston and valves are still okay, just to be safe. Then I'll put in a new set of roller rockers, because shiny new engine parts are fun.