Blow By

You shouldda seen my slanty idling with a hole in the side of the block and the broken rod doing the crazy dance.
that was not blow-by, but rather; blow out.
Edit:
were they tough?
Apparently not tough enough.
I've never windowed a SBM

A friend of mine at a bush-party, once bricked a 318 gaspedal at WOT . After 20 minutes of listening to that thing roar, somebody flipped the brick off. It stalled and would not restart. I bought the car for $50, and pulled the heads off. Hyup there was the evidence; the valves had hit the pistons and were bent.
A couple of hours later, with different heads, and she was back in action.