It is weird but that was done by the previous owner maybe?
Run it through a CID calculator and see what you get.
A 383.
Depending on when the engine was built or the amount of money on hand or perhaps the parts available when built or on hand when built..... the .123 difference in the rod could have been used to get a final piston placement in the cylinder bore and IMO, it is not a big thing in the over all picture.
