Cab, there was no such thing as a Mopar "World" block in the early 2000s.
it didn't exist yet.
If you meant the megablock as I am assuming you might have, then I would have to agree with your findings...the bore would not be a determining factor, small bore was available both ways.
your correct
it was in the late 2000s, not earlier
I built that one around 2008 or later with the block ordered from my local Dodge dealer, it was a World block
I did build several other N/A cast iron hemi blocks that where the earlier Mega blocks, one 4.25 bore and the others where either 4.320 or 4.380 bore sizes, CRS
I finished a pump gas EFI 572 C.I. motor earlier this year with one of the old World blocks that was 4.490 rough bore size, it made right at 799 HP at 6500 RPM, a little less torque than HP
