anyone know what could cause dime sized holes in 2 valves on the exhaust side of my head? holes were in two different cylinders. i was just wondering how this might have happened and if anyone thinks this might have caused more damage elsewhere.

Lean condition or too much timing can do that. Dime size is pretty big though...

I've seen it before though. Remember those metal pieces went somewhere... possibly into the oil passages. I'd check the pistons for damage too.

could it have jumped a tooth on the timming belt and still ran?