Block out of square

I have no doubt that block went 100K plus with no issues.
That’s not to say with it as f’ed up as it is, that it’s going to provide trouble free service in the next application.

It never got checked for that, for use as a suitable core because it’s one of those things that’s not usually a problem.
Every once in a while you get burned by something like that.

I’ve never been caught by that particular issue, but have found things machined way wrong from the factory that I wished I’d have caught sooner than I did.