I’m with Triedaq on this one. Once the head comes off, both the head and its corresponding surface of the block can be inspected. If the head isn’t warped (warning: it likely is warped), then you might even get out of this reasonably…albiet not cheaply.
A complete overhaul IMHO would be overkill. While overheating is not good for the engine, typically the “short block” (everything from the head down) will not be damaged, as it would were she to run it without oil.