Finally get to pretend I am one of the cool kids - Holley kit swap

Brilliant! I will keep that idea in mind.

I wouldn't expect yours to have it, I was assuming it was a later model addition. But I was just guessing.

I'm 99% sure that's why they were there. Guessing the factory probably uses them as tooling points to hold the case while machining/assembling, maybe while installing as well. Figured why not take advantage of them?