Yep. As noticed...the one I linked to on ebay above is without lifter bores + without pushrod holes. Really not for the @home builder LOL. Although there are plenty of shops that could handle it and get it ready.

I'm not sure if I am remembering right but, on another motor castings block that I have seen I don't recall the foundry mark being touched when the wedge mounting "ears" were chopped off. But I also think that one is different because it is a water block so, apples and oranges/maybe foundry mark in a different location(?). I know where it is located and will take a look if I get a chance.

Lots of history and details to learn about these.
Which can either be helpful, or just trivia lol.