Yeah, you might be correct there. I do get confused about the various ambiguous uses of "block".

But it does normally mean 1024 bytes for most purposes, and given there's a Hijack kernel installed right now that is reporting 33527655 blocks as the size, I think it does mean 1024-bytes (320GB total) for that line at least. Which approximates the physical drive size.
Naw.. You're probably right!

The other number could just be the modulo-128GB value that was created when building the filesystem without LBA48 support.

Cheers