Well, I just broke my 360 block. Terminal?

Well you should not post to these questions then. Why...?? because your giving an opinion based on your "feelings and emotions" rather than based on sound mechanical principals and logical thinking.
Fact is that as long as the bearing covers the hole once the metal is removed, then there won't be a leak. those bearing shells are clamped in nice and tight , their force is exerted against the crank bores and will act as a blank off plate , so will the parting line of the bearing and the main cap. Yellow Rose is spot on.
You just gave an opinion. You have no idea if and how much it will leak and if harmonics will continue to weaken the spot. So maybe you shouldn't post because you have no "facts"..... just your opinions based off of your "feelings" about the situation.