Block cleaning.

I hope that thing is a Hemi or the numbers matching block to go through all of that.

It's not about making it look good. It's about having it run good and be reliable. Would do the same for a /6. It's paying it forward.

When people buy special radiators, electric fans, Evans coolant, etc... I wonder what the insides of their block looks like.

Yes it takes some extra time to do this. But that's why most rebuilders can't add that cost to a rebuild. You gotta be hands on.