Yeah, that was with the earlier Champion CC374. They updated it to a CC374B and they may have changed the mounting holes at that point, not really sure. They weren't that far off, a decent sized washer would hide all of the mounting holes.
Plus who knows, I used a factory 26" radiator to locate the mounting holes in the radiator support, but my car was converted from 22" so it's entirely possible the difference was on me locating the holes.