Truck starting running like shit Saturday. Almost like it wanted to flood its self out but was running on one cylinder. I spent 4 hours diagnosing threw the harness, wiring looks perfect... Shocking myself check the distributor and wires and such... No go.

Well I also noticed a knock sound, it wasnt consistent so I ruled out a rod... As a last resort I pulled the valve cover and found a slightly bent pushrod. Thinking I found the problem, slapped another one in and started it. Sounds better but the sound is still there and scaring the shit outta me at this point. The HiPo slant six's are hard to come by and I really dont wanna replace it. So at this point I said fuck it and pulled the head, and found this in #6 cylinder.



Its what used to be a nut of some sort. Looks like a ball bearing now. The piston has small dimples in it from the sharp edges but nothing is major and im happy for that.

Pic's... This is #6 spark plug.