Head gaskets

pittsburghracer said
It’s not the bore that bites you. It’s the head chamber. Not many guys think to check that.

Well said....kaboom starts on the top (chamber) side of the gasket.

And I have to quote you again,

pittsburghracer said
It’s not the bore that bites you. It’s the head chamber. Not many guys think to check that.

....because 99% of all the internet 'fail tales' are due to the installer's lack of proper checking, even though folks usually want to blame the manufacturer.